Reading Classroom Explorer: Navigating and Conceptualizing a Hypermedia Learning Environment
Joan E. Hughes
Becky Wai-Ling Packard
P. David Pearson
Note: To read the transcript of an online chat with the article's authors, click here.
This multimedia article is adapted with the permission of P. David Pearson and the National Reading Conference from Hughes, J.E., Packard, B.W., & Pearson, P.D. (1997). Reading Classroom Explorer: Visiting classrooms via hypermedia. 46th Annual National Reading Conference Yearbook. Chicago, IL: National Reading Conference.
Introduction
During preservice education, prospective teachers develop personal philosophies of teaching, and, through their field work in internship settings, they test
the assumptions that lie behind those evolving philosophies. These philosophies emanate
from a variety of sources: the views and practices of collaborative teachers, the views of their education professors, books and journal articles, and their own experience as learners. For many reasons, this mix of influences and experiences may not offer a diverse representation of teaching and learning. The department in which the preservice teachers earn their degree might hold specific views of learning and teaching. The ethnic, cultural, and economic diversity of the schools in which they intern may be limited, quite often due to the location of their university. The readings they do for methods classes may fail to emphasize the diversity that characterizes our society. This raises a dilemma for teacher educators, especially those who are located in settings without much cultural variation: Short of transporting their students to a range of settings, how can education departments engage preservice teachers in experiences in which they are exposed to culturally sensitive teaching? Broadening preservice teachers' opportunities to observe children and teachers from different cultural backgrounds, environments, and theoretical perspectives may enhance their ability to assess and incorporate those experiences into their personal philosophies of teaching and learning.
It is this goal of engaging preservice teachers as actively as possible in classrooms in which they can see teachers exercising their craft with a wide array of culturally and intellectually diverse students that has motivated our research into hypermedia as a tool for teacher education. Not only did we want to transport students to these classrooms, which we could already do via videotape, to see the diversity in action, but also we wanted to allow them to visit, revisit, analyze, critique, compare, and contrast a set of diverse classrooms in the rich, flexible, and idiosyncratic manner that hypermedia might provide. In this article, we document and analyze our initial forays into hypermedia space. Return to Contents
Background Research about other hypermedia systems provides some evidence to expect deeper engagement; findings of deeper engagement range from students' increased intertextual connections, greater depth of reading, and greater motivation to read (Landow, 1992), to their ability to determine personal interpretations from multicase analysis (Landow, 1992; Marchionini & Crane, 1994), to their capacity to present more sophisticated arguments in discussion and written work (Marchionini & Crane, 1994).
Cognitive Flexibility Theory (Spiro, Feltovich, Jacobson, & Coulson, 1992a; Spiro, Feltovich, Jacobson, & Coulson, 1992b; Spiro & Jehng, 1990;), with its incorporation of Wittgenstein's (1953) metaphor of the "criss-crossed landscapes," commonly serves as a basis for conceptualizing learning in hypermedia environments. Spiro and Jehng (1990) explain:
...one learns by criss-crossing conceptual landscapes; instruction involves the provision of learning materials that channel multidimensional landscape explorations under the active initiative of the learner (as well as providing expert guidance and commentary to help the learner to derive maximum benefit from his or her explorations); and knowledge representations reflect the criss-crossing that occurred during learning. (p. 170
We suspect and hope that our hypermedia environment will allow optimal user-directed exploration of teaching reading in culturally sensitive ways in a manner that is clearly consistent with the "multidimensional landscape exploration" of the Cognitive Flexibility Theory. We also feel that teaching as an intellectual enterprise, especially as it is conceptualized and experienced by preservice teachers, truly qualifies as an example of Spiro's (1992b) concept of an ill-structured domain. As in other ill-structured domains (for example, practicing medicine, literary criticism, or conducting biological research), individuals must learn to balance ideas emanating from multiple, and sometimes contradictory, "truths." According to Spiro and Jehng (1990), ill-structured domains are characterized by increasing content complexity and irregularity in applying knowledge across cases. This tendency toward ill-structuredness increases as one moves from more basic to more advanced stages of learning. At advanced stages, "the goals of the learning shift (1) from the attainment of superficial familiarity with concepts and facts to the mastery of important aspects of conceptual complexity, and (2) from knowledge reproduction to knowledge use (transfer, application)" (p. 165). The learning of teaching ought to be thought of as an ill-structured domain. Even at novice stages, we encourage preservice teachers to observe, analyze, compare, and contrast classrooms of diverse students, teachers, and subject areas, from which they develop a personal teaching philosophy. Preservice teachers' diversity of experiences and philosophies underlie the multiplicity of truths about teaching.
Based on this theoretical stance and research results, we feel that a collection of videotapes (for example, the Center for the Study of
Reading's "Teaching Reading: Strategies from Successful Classrooms"), viewed serially, does not allow the user maximal, perhaps not even optimal, access to the information for analysis and review. Rather, a hypermedia system in which many different types of media -- text, video, audio, still pictures, animation, etc. -- from many classrooms combined in an environment in which the user has a significant amount of control over the delivery of the media not only broadens teachers' knowledge of teaching reading and expands their repertoire of experiences from which they form a teaching philosophy, but also serves as a stepping stone to help teachers learn to use hypermedia environments and increase their comfort levels when using other technologies.
This new form of educational instruction for preservice teachers differs from conventional forms of instruction in several ways: (1) user control of information; (2) on-demand access to multimedia including video clips, transcripts (text), audio clips, supplemental reading topics, and applicable research articles (citations); (3) ability to juxtapose media from several school sites; (4) searchability of information using school location, theme, key words, or even words appearing in the transcript of the video; and (5) areas for individual journal entries, collaborative notes, and bulletin board discussions. This new form of instruction may require new skills and may elicit strong responses, both positive and negative. At this beginning stage of development, we were particularly interested in students' views of the program's design, features, and general effectiveness in helping them analyze teaching and learning.
Product Development We developed the Reading Classroom Explorer, a hypermedia learning environment, for use in teacher
education. Users can explore six classrooms in which exemplary teachers are teaching reading to
diverse students. The following sections describe its development.
Video Clips
We used six videotapes, developed in the early 1990s, as the source of our video footage of reading instruction in classrooms. Portions (clips ranging from 30 to 120 seconds in length) of the videos were digitized into QuickTime videos. We descriptively named each video clip (with tags such as "Reading Materials, Danville"), categorized it into as many themes as appropriate (see description of preselected searches in the
section "The Investigate Screen" below), and brainstormed a list of key words such as "parent
involvement" or "engagement" to describe the content of the clips.
Creating the user interface. Reading Explorer has two main screens in its user interface, the Search Screen and the Investigate Screen.
The Search Screen (Figure 1) contains search mechanisms that allow users to search by schools, themes, and key words.
The Investigate Screen.
The Investigate Screen (Figure 2) incorporates many features that, as explained by Spiro and Jehng (1990), provide "expert guidance and commentary to help the learner to derive maximum benefit from his or her explorations." Once a clip name has been clicked, the video appears in the upper left corner of the Investigate Screen and automatically starts playing. The user controls the play and the sound of the video. The clip's transcript appears to the right of the video. Above the current clip, the "Recent Clips" pop-up menu tracks the history (in order) of viewed video clips during a session. By choosing one of the recent clips listed, the program will recall and display the video clip and other relevant information.
Every video clip, depending on the content, has been tagged with at least one broad theme (usually several) in our list of "Preselected Searches." For example, the clip called "Reading Materials, Danville" presents innovative ideas about reading materials while the teacher leads a small group discussion. Thus, this clip is tagged with both the "Reading Materials" and "Small Group Reading" themes. On the Investigate Screen, the two fields "Questions" and "Additional Information" are theme sensitive; that is, the information displayed in these fields depends on the theme that was responsible for the clip's appearance in the list generated by the parameters of the search. Therefore, just under the displayed clip, the "Switch Theme" pop-up menu allows the user to see and switch between the clip's theme(s). When the user clicks "Switch Theme," the Question and Additional Information section's contents change.
The Question field presents questions about the content of the video clip. Some include the responses of the teacher featured in the clip. Other questions are designed more to stimulate the user's thinking than to query specific information. To obtain more information about a topic presented in a clip, the Additional Information field displays citations from articles and books within the practitioner and research literature.
A significant portion of the Investigate Screen is occupied by the users' notebook field. Users may type text (notes, comments, or questions) into the notebook. They also can insert the current clip's name with a button click. Users may not only organize ideas and comments around a clip's name but also reboot the clip by clicking on the clip name. The notebook contents is printable and saved on a user's Reading Classroom Explorer disk, facilitating the insertion of a user's notebook contents into the program during another session. Further development of Explorer will facilitate users' ability to make their notebooks, along with inserted clips, available to peers in a public forum.
A "Quit" button appears on each screen, which shuts down the program and saves the notebook contents onto the user's disk. The "Search" button on the Investigate Screen, when clicked, moves the user to the Search Screen.
See Appendix 2 for updated Explorer screens.
Method Participants To obtain volunteers for our phase 1 pilot, we introduced Reading Classroom Explorer to participating teacher education classes at a large midwestern United States
university. After a short demonstration, students were invited to use the program. Those who expressed a desire to learn more about the program and its content were asked to contact us. The final group of participants included two single gender pairs (one female and one male) and five individual participants (two males and three females).
Procedures
The basic research strategy was to invite the participants to navigate their way through the program and to think aloud about both the navigation process and the content they encountered. Toward the end of the sessions, which lasted between one and two hours, they responded to a set of interview questions that we had prepared, focusing on both the navigation process and the content of the clips.
Because the think-aloud protocol was so central to the quality of our data, participants began their session by watching a short video exemplifying the talk-aloud method. We used computer-related tasks such as spell checking and scanning photos. In this way, we demonstrated the method without suggesting strategies for using the intended target of research, the Explorer. We had two demonstration videos: one for participants working alone and one for participants working as a pair.
Video Option | Sound Option |
|---|---|
(6.7 MB) | (1.3 MB) |
| Video Option | Sound Option |
|---|---|
![]() (10 MB) | (1.9 MB) |
Consistent with this research tool, participants were asked to verbalize their thoughts and reactions while navigating through the program (Afflerbach & Johnston, 1986; van Someren, Barnard, & Sandberg, 1994).
After participants expressed clarity about the nature of the think-aloud process, we reacquainted them with Reading Classroom Explorer, ensuring that the participants understood the major features and functions of the program. Two basic prompts were used to structure their navigation through the program. The first prompt asked them to come to an informed opinion about small group instruction (in relation to the debate over whole-class versus small-group instruction) by consulting clips in this program. After the
participants spent about 15 minutes of viewing and thinking aloud, we asked them to tell us their opinion. Immediately following, we gave them the second prompt; we invited them to explore any issue they found interesting. After they had explored (and talked aloud) about a second issue, we moved to a debriefing session in which we asked the participants a set of prepared interview questions related to their use of the program during the exploratory sessions as well as questions relating to participants' views of the program in more general terms. During this time, the participants were also encouraged to ask questions to clarify their thinking about the program and its features.
Data Collection and Analysis
Each session was recorded on both video- and audiotape for later mapping,
analysis, and, where appropriate, transcription. In our first pass through the tapes, we created a data "map" by writing a short descriptive summary of each major chunk: videotaped navigation and/or response to interview questions. These maps were used to guide subsequent searches for evidence to evaluate emerging hypotheses and claims about the participants' responses to the hypermedia environment. One or another of the authors took the lead in developing interpretations of the responses of each individual or pair. These developing interpretations were brought to a staff meeting at which the three of us challenged, corroborated, extended, or refined the claims presented. These conversations usually triggered a revisit of the maps and data tapes for further analysis and interpretation.
As this process progressed, we found ourselves using metaphors (for example, "She's on a Sunday bicycle ride") to characterize the navigational journey of each individual or pair. As our analysis progressed, we decided to make these metaphors more prominent in our analysis. We brought them to our group meetings for scrutiny and refinement, and often decided that yet another pass through the maps and tapes was required before we could settle on a particular metaphor or interpretation. We continued this process iteratively until we were collectively satisfied that the current metaphors and interpretations represented the best account we could offer of the data. Common ethnographic tools, such as constant comparative analysis, triangulation, and negative case analysis were used throughout this iterative process. Again, our goal was to use the data from these tapes to begin documenting students' (1) use of the program, (2) views of the effectiveness of using the program collaboratively versus individually, (3) attitudes and feelings about the program, and (4) views of the advantages and disadvantages of this instructional medium.
Return to Contents
Results In conceptualizing and developing Reading Classroom Explorer, we had specific ideas of how students and instructors might use such a program. In our preliminary research and analysis of the data, we found a diversity of responses to the technology, both in the way users navigated through the program as well as in their views of its possibilities as a learning environment. As suggested in our discussion of methods, a collection of metaphors describing participants' conceptions of the learning environment and navigational stances emerged from the collected data during research staff meetings. Here, we have provided a collection of the most provocative cases and metaphors. Case 1, Diane: "The Construction Zone" and "Club Med" Diane used Reading Classroom Explorer as a construction zone through which she built her own concept of what it meant to teach and be a teacher. She approached the material housed within Explorer analytically as she stated,
To help her construct meaning, a hierarchy of useful types of information about teaching became evident. In Diane's investigations, her reactions to the video clips and her comments about valuable features illustrate this hierarchy.
The clips containing examples of children reading in small or large groups were not that significant for Diane. She responded to these clips with simple iterations such as "That's cute," or "That's funny." And she explicitly stated her desire for more background information, perhaps from the teacher. In some cases, she did find clips that contained the desired teacher perspective, as in the following example:
Diane made a concerted effort to choose clips that she thought would contain the teacher perspective. At one moment of clip choice, she explained her rationale: Upon viewing such clips, Diane's comments expand analytically and conceptually. She responded: With more teacher context, Diane was able to connect her preservice education classes, her experience with children and schools, and the clips she viewed.
Diane identified Reading Classroom Explorer as an excellent source for contrast and analysis during the preservice educative process. She explained the benefit: At the same time that she professed this benefit of the program, she also warned against using it too early, for she believed that the less experienced preservice teachers would not be analytical, but rather search for answers or the "rules" of teaching. She explained: The phenomena that Diane explains is similar to the manner in which Kevin, another individual participant, approached the program as a "Teaching Machine" (see the next case).
Diane navigated through the program as if she were trying to decide how to choose activities for the day at a resort; hence the Club Med metaphor. Like those who practice a known sport, Diane used the media to find support for her own notion of small-group reading instruction. She explains, strengthens, and supports her position in response to video evidence contained in Explorer. Like a Club Med visitor who chooses to learn a new activity, Diane also viewed Explorer as a medium to help expand her teaching repertoire. For example, she decided to investigate classroom rules as her free choice issue because she felt that she was having difficulty identifying them through classroom observations in her field experience:
Case 2, Kevin: "The Teaching Machine" and "AAA Trip-Tik" An apt contrast to Diane is Kevin, who saw Explorer as a teaching machine. He wanted it to give him the answers or heavily direct his thinking about issues of teaching. Kevin's sole reaction of one of many clips he viewed was,
Clearly, Kevin depends heavily on teacher-prompted analysis to provoke his thinking. He explains:
Similarly, he states that without the teacher perspective and questions,
After using the program, Kevin thinks:
He desires more background information:
Kevin is not able to use the media in the program to determine the good points and bad points for himself. He focuses on the program, just as he would on a teacher or a textbook, to dictate the "correct" way to teach instead of using the media to construct his own concept.
We liken Kevin's navigation of the program to driving with the aid of a AAA (American Automotive Association) Trip-Tik, which maps the quickest route between points along the way to a predetermined destination. He wants to find the answers quickly and efficiently. During his investigation, he considered several lists of video-clip matches. In every instance, he either viewed the clips from top to bottom or the clips that best matched by name. Kevin disregarded information that did not absolutely match his search, as illustrated when he ignored the "Related Clips" section, for
In response to the need for background information, one of us proposed providing access to preceding and following clips. His "efficiency" stance is again clear when he states,
He dismissed the idea because these other clips could possibly be off topic and thus reduce his efficiency toward retrieving "just the facts."
Return to Contents
Case 3, Judy and Liz: "Online Library" and "Touring on a Tandem Bicycle" The learning environment metaphor that came to mind for Judy and Liz was an online library. Together, they collaborate almost every decision, ranging from simple navigational or featural choices to complex coconstruction of critical analysis of a video teacher's approach. As a pair, they focus on the media and build meaning from the content of the clip, the background knowledge that each brings to the task, and each other's comments: Similar to both Diane and Kevin, Judy and Liz found the Question section helpful in their analysis of clips. Judy explains, Return to Contents
Case 4, Matt: "1001 Ideas for Teaching Reading" and "Inner-Radar" Matt sees these clips as idea generators, useful to him as a future teacher in the same way that an "idea" magazine might trigger a new project for a committed do-it-yourself home project addict: Matt felt that many program features also supported idea generation. The clip names lead him from one idea to the next as he explains: He also uses the "Preselected Search" categories to brainstorm topics to explore. For example, Matt said, "Well, let's take a look at this library [pressing on the Preselected search]," and chooses "Reading Environments" to investigate the effect of ceiling lighting on learning. Although this preselected search does not inform his intended investigation, Matt discovers ideas about field trips, home-school connections, and parent involvement to support reading.
In formulating his teaching philosophy, Matt relies on research. He explains: Overall, Matt saw this learning environment as a place to get ideas that correlate with his own teaching philosophy.
It seemed as if Matt navigated using inner-radar, most likely due to his considerable prior computer experience. Experience programming in C++ informed the "And/Or" Boolean choice, the problems with spaces in search fields, and the possibility of case-sensitivity affecting his search. He noted similarities between Explorer and Netscape or WebCrawler in searching, and he critiqued the database, indicating a high level of computer experience, Return to Contents
Cross Case Observations
Looking across these four cases, some observations and some (tentative) conclusions are warranted at this early stage in our work. Perhaps the most striking commonality in the responses was their positive disposition toward Explorer as a tool that they could use on their own to explore issues and questions that would arise in their teaching. The idea of having all of these experienced teachers as "online" consultants whose brain they could pick on very, very specific questions was quite appealing. Even Kevin, who wanted much more guidance from his teaching machine, could see possibilities for ways in which he might be able to use Explorer.
Viewed Clip Diane's Response
(3.3 MB)
(990 K)
Viewed Clip Diane's Response
(2.9 MB)
![]()
(830 K)
(512 K)
I'm just trying to decide like what one, like, which one maybe tries to involve the teacher a little bit.... I'd kind of like to get her [teacher] perspective on it.
Viewed Clip Kevin's Response Transcript
(3.7 MB)
(380 K)
"It's short. I'm always expecting more, like it should be a little longer clip.... It doesn't seem like it's giving me a lot of information."
![]()
(250 K)He has "no clue" of a use for the notebook. ![]()
(250 K)It gave nice clips...but really didn't do anything to influence my thinking. ![]()
(250 K) [he] wouldn't use those...if they are just kind of...related. ![]()
(670 K)I guess if I was looking at a particular topic, I don't know if it would really, if it would talk about, if that preceding clip would talk about that topic.
![]()
(290 K)"But I think if there wasn't a theme [Question section], it would be harder to kind of get out of what each of the segments is focusing on."
Viewed Clip Matt's Response
(2.4 MB)
(480 K)
![]()
(350 K)The database search is really nice how it cross-references and finds all this stuff...as computer programs go that's really nice and I think it's really wonderful.
| Diane | Kevin | Judy and Liz | Matt |
(350 K) |
(512 K) |
(1.3 MB) |
(1 MB) |
A second common response was "amazement." The preservice teachers were amazed that they (and remember that only Matt considered himself a computer buff) could actually negotiate a fairly complex computer program and make it serve their own needs and interests.
| Diane | Kevin | Judy and Liz | Matt |
|
(736 K) |
(450 K) |
(224 K) |
(736 K) |
Third, students responded in a variety of ways to the technology as a learning environment, as a body of content to be learned, and as a tool to be mastered. One of the reasons that we found the metaphors so useful is that each seemed so uniquely appropriate for each individual or pair. Following are selected sound clips that illustrate some evidence of why we chose the specific metaphors for each participant.
| Diane | Kevin | Judy and Liz | Matt |
| Construction Zone | Teaching Machine | Online Library | 1001 Ideas |
(384 K) |
(480 K) |
(930 K) |
(512 K) |
We know that as we expand the number of participants in our work, we are likely to find additional exemplars for each of our metaphors, but so far the idiosyncrasy is as characteristic as commonality of response, if not more so. In a sense, Explorer can be viewed as possessing chameleon-like qualities in that it is adaptable to the needs, interests, and capacities of participants who vary dramatically in the backgrounds they bring to the program and the purposes for which they will use it.
The final commonality relates to participants' struggles with certain program features. For example, many found button and pop-up menu names confusing. Others desired some way of indicating which clips they had already viewed. These problems introduced the disparate perspectives of the program developer and the user and supported our view of the importance of incorporating user testing into the program development process. Our participants' responses to such features warrant redesign and perhaps even reconceptualization. Since the time of these interviews, we have addressed the problematic features of the Explorer. See Appendix 1 for the participants' views of the notebook and transcript features and Appendix 2 for the updated program screens.
Return to Contents
Further Research Even as we write about our phase 1 experiences, we are already engaged in subsequent phases of our work. As we move into more elaborate trials of Explorer, we hope to address a number of questions raised in our analysis of the responses of participants in phase 1. Prior experience, for example, as it played out in the four case studies, surprised us. As we continue to examine the data, we hope to explore the possibility that background experiences, prior knowledge, or even gender-related dispositions contribute to the variation in response. For example,
Those self-described as computer novices, mainly women in our participant sample,
Through their explorations, they grew more comfortable with the technology and felt they could use it on their own, which lended support for our auxiliary goal of having Explorer provide a stepping-stone experience with technology. We need to conduct further analysis and research to determine if there is support for these emerging patterns.
A second issue involves the relationship of Explorer to the video series from which it was adapted. As revealed in their responses, some of the students had actually viewed some of the videos in their entirety. Their ability to make connections between their recollection of the entire video and the particular clips from that tape that appeared in their tailored searches makes us wonder about the role of Explorer in relation to the video tape series: Should Explorer be used in conjunction with videotapes as a medium to allow students to "explore" particular issues AFTER they have a broader and more contextualized sense of what each teacher was up to? OR, can Explorer stand on its own?
![]()
(864 K) the male participants, who also were majoring in science, voiced a need for more research data. ![]()
(832 K)concentrated on learning the technology rather than exploring the content.
| Diane | Kevin | Judy and Liz | Matt |
(1 MB) |
(512 K) |
(864 K) |
(736 K) |
Participants were amazed at the technology but did not find it particularly difficult to use; they found it more efficient than viewing videotapes, felt the video clips provided concrete examples, and gained new perspectives about teaching reading. However, in order to discern novelty effects, we will conduct research in classrooms using Explorer as an integral part of the instruction. In this way, we may ascertain if this is a supportive environment for analysis of the techniques for teaching reading and for further preservice teachers' learning.
Further, we will explore the use of video cases in teacher development. Our hypermedia program is the perfect context in which to extend Copeland and Decker's (1996) finding that individual participants incorporated meaning developed in group discussions of a single video case into their own meaning making three weeks later. Our research may inform questions relating to the role of conversations surrounding the videos, the question of number (many cases versus a single case), the social context in which the environment is traversed (individual versus paired versus group exploration), and the criterion for aggregating and juxtaposing clips (theme versus classroom, for example).
Return to Contents
References Afflerbach, P., & Johnston, P. (1986). Research methodology on the use of verbal reports in reading research. Journal of Reading Behavior, 16(4), 307-322.
Copeland, W.D., & Decker, D.L. (1996). Video cases and the development of meaning making in preservice teachers. Teaching and Teacher Education, 12(5), 467-481.
Landow, G. (1992). Hypertext: The convergence of contemporary critical theory and technology. Baltimore, MD: Johns Hopkins University Press.
Marchionini, G., & Crane, G. (1994). Evaluating hypermedia and learning: Methods and results from the Perseus Project. ACM Transactions on Information Systems, 12(1), 5-34.
Spiro, R.J., Feltovich, R.J., Jacobson, M.J., & Coulson, R.L. (1992a). Cognitive flexibility, constructivism, and hypertext: Random access instruction for advanced knowledge acquisition in ill-structured domains. In T.M. Duffy & D.H. Jonassen (Eds.), Constructivism and the technology of instruction (pp. 57-75). Hillsdale, NJ: Erlbaum.
Spiro, R.J., Feltovich, R.J., Jacobson, M.J., & Coulson, R.L. (1992b). Knowledge representation, content specification, and the development of skill in situation-specific knowledge assembly: Some constructivist issues as they relate to cognitive flexibility theory and hypertext. In T.M. Duffy & D.H. Jonassen (Eds.), Constructivism and the technology of instruction (pp. 121-128). Hillsdale, NJ: Erlbaum.
Spiro, R., & Jehng, J. (1990). Cognitive flexibility and hypertext: Theory and technology for the linear and nonlinear multidimensional traversal of complex subject matter. In D. Nix & R. Spiro (Eds.), Cognition, education, and multimedia: Exploring ideas in high technology (pp. 163-205). Hillsdale, NJ: Erlbaum.
van Someren, M.W., Barnard, Y.F., & Sandberg, J.A.C. (1994). The think-aloud method: A practical guide to modeling cognitive processes. San Diego, CA: Academic Press Limited.
Wittgenstein, L. (1953). Philosophical Investigations. New York: Macmillan.
Reading Online, www.readingonline.org
Posted February 1998; links updated July 2000
© 1998-2000 International Reading Association, Inc. ISSN 1096-1232