Classroom Activities and Areas: Regularity of Use and Perceptions of Adaptability by General Early Educators

This report describes a mail survey of general early educators from Head Start, public school pre-kindergarten, public school kindergarten, and community preschool/child care programs. The purposes were to secure information about the availability of classroom activities and areas, and to obtain the respondents' perceptions of the ease with which activities and areas could be adapted to accommodate children with disabilities. Of the 893 mailed questionnaires, 483 (54.1%) were returned and coded. The respondents reportedly used a wide range of classroom activities and areas, and they rated those activities and areas as moderately easy to adapt. Also, respondents from mainstreamed programs used slightly more activities and perceived the activities as easier to adapt than did respondents from non-mainstreamed programs. The findings appear to indicate that placement of children with disabilities in segregated programs cannot be justified on grounds that integration will restrict the range of activities available to typically developing children, or on the grounds that the adaptations are perceived by program staff as too difficult to be accomplished.     

A cross-age study of the understanding of five chemistry concepts

A sample of 100 students from junior high school physical science, high school chemistry, and introductory college chemistry were examined for understanding of five chemistry concepts. The concepts addressed were chemical change, dissolution of a solid in water, conservation of atoms, periodicity, and phase change. The amount of experience with the concepts (grade level) and reasoning ability (developmental level) were examined as possible sources of variation in student understanding. Differences in understanding with respect to grade level were found to be significant for the concepts of chemical change, dissolution of a solid, conservation of atoms, and periodicity. However, few of the students in the college chemistry sample exhibited sound understanding of chemical change, periodicity, or phase change. The use of particulate terms (atoms, ions, molecules) increased across the grade levels. Reasoning ability proved to be a significant factor for student understanding of conservation of atoms and periodicity. An examination of the number and types of misconceptions across the grade levels revealed several interesting patterns and suggested sources for the students' alternative conceptions.     

A Pavlovian analysis of food-attraction conditioning in the snailHelix aspersa

Following brief pairing of an odor with a feeding experience (food-attraction conditioning), snails will lower their tentacles when subsequently presented with that odor alone. Three experiments investigated the possible behavioral mechanism mediating food-attraction conditioning in the snailHelix aspersa. It is suggested that food-attraction conditioning is an example of Pavlovian conditioning. In this case, the odor (conditioned stimulus) is paired with oral stimulation (unconditioned stimulus), which elicits lowering of the tentacles (unconditioned response). Following conditioning, the odor comes to elicit lowering of the tentacles (conditioned response). Experiment 1 ruled out nonassociative effects, such as habituation and sensitization, using an unpaired control group. Experiment 2 provided further evidence against a role for habituation of neophobia, through the demonstration of extinction following conditioning. In Experiment 3, an omission procedure was used to rule out the possible role of instrumental contingencies.     

Travelling the Unpaved Road to Democracy from Communism: A Cross‐Cultural Perspective on Change

The basic subject of this article is change, how one copes with it, how it can or cannot be guided. More specifically, the author, a Czech‐American scholar, examines the processes and the trauma of the post‐1989 transition in his country of birth with an eye to how education, particularly higher education, can contribute to a successful outcome to transition affecting all of society while undergoing transition itself. Crucial to the presentation and arguments of the author is his conviction that the period of communist rule in Czechoslovakia, as in the other central and eastern European countries, was intellectually and morally damaging. For the citizens of the Czech Republic as well as for those of the other central and eastern European countries who also experienced communism and who are now trying to recover from it, it is necessary that they develop a clear understanding of what communism really represented and what it did to them. For them to gain this understanding, the catharsis that goes with it, and the possibility of developing successful reforms that will move their countries forward in a constructive way, they must develop a number of cross‐cultural skills through familiarity with a number of social science and educational disciplines that were more‐or‐less closed to them. The author proposes ways in which these skills can be learned and education at all levels profoundly reformed.     

Self-modeling as an intervention to increase student classroom participation

The effect of self-modeling as an intervention to increase individual participatory behavior in the classroom was investigated using a multiple baseline design across three second grade students with a follow-up. In addition, a control student was employed to further investigate the effects of the intervention. Self-modeling is defined as the positive change in behavior resulting from spaced viewing of oneself on edited tapes depicting exemplary behavior. Students viewed edited videotapes of themselves successfully volunteering to participate in class by raising their hand. The three students, during baseline, had a mean participation rate ranging between 8% and 24% compared with the control student's rate ranging between 53% and 63%. During intervention, the mean participation rate ranged between 28% and 60% compared with the control student's rate ranging between 43% and 46%. At follow-up, students had a mean percentage rate ranging between 44% and 64% compared with the control student's rate of 53%. Thus, they more closely approximated or surpassed the control student's mean rate of participation during intervention and follow-up, suggesting that the self-modeling intervention was effective in increasing individual participatory behavior in the classroom. © 1998 John Wiley & Sons, Inc.     

Using New Proximity Measures With Hierarchical Cluster Analysis to Detect Multidimensionality

A new approach for partitioning test items into dimensionally distinct item clusters is introduced. The core of the approach is a new item-pair conditional-covariance-based proximity measure that can be used with hierarchical cluster analysis. An extensive simulation study designed to test the limits of the approach indicates that when approximate simple structure holds, the procedure can correctly partition the test into dimensionally homogeneous item clusters even for very high correlations between the latent dimensions. In particular, the procedure can correctly classify (on average) over 90% of the items for correlations as high as .9. The cooperative role that the procedure can play when used in conjunction with other dimensionality assessment procedures is discussed.     

Generating Random Parallel Test Forms Using CTT in a Computer-Based Environment

This paper describes a procedure for automated test forms assembly based on Classical Test Theory (CTT). The procedure uses stratified random content sampling and test form pre-equating to ensure both content and psychometric equivalence in generating virtually unlimited parallel forms. The procedure extends the usefulness of CTT in automated test form construction, yielding classical item statistics based on representative sample distributions and pre-equated test forms with known psychometric characteristics. A rationale for the procedure is presented followed by an example application and discussion of psychometric considerations related to its use.