Investigated changes that occurred in sixth- and seventh-grade teacher and student discourse when teachers endeavored to implement extended teacher wait-time in a sequence of seven lessons related to probabilistic reasoning. Results indicated that teacher wait-time increased from an average of 1.9 to 4.4 seconds during the lesson sequence. (JN)

Identifies promising areas of aptitude-treatment interaction research (ATI), including research related to general ability, anxiety, prior achievement, and achievement motivation. Also provides general methodological ATI guidelines for science educators. (JN)

Describes a technique that can be used to construct variables from clinical interviews that can be used in quantitative analyses. The technique involves the representation of each proposition a student uses in terms of a standard set of underlying predicates, concepts, and relationships among concepts. (JN)

Twenty-two high school biology textbooks published between 1963 and 1983 were analyzed for their treatment of social issues. Results showed that attention to social issues decreased in these textbooks between 1963 and 1983. Implications of the results for biology education in the 1980s are discussed. (JN)

Long-term retention effects of two methods of instruction used one year earlier to teach field-dependent and field-independent sixth-grade students to control variables and to transfer this ability to novel tasks were investigated. Also examined whether or not uninstructed seventh-grade students had acquired this ability on their own. (Author/JN)

Determined whether chemistry students (N=332) understood analog tasks that could be used for teaching the mole concept. Also identified possible difficulties that students might have in solving mole problems. Seven major conclusions are reported and discussed, including the finding that two-step problems were more difficult to solve than one-step…

Investigated the relationship between teachers' (N=35) ability to understand science processes and to control variables and students' achievement in science content and processes. Results indicate that teacher ability to control variables is a more valuable characteristic than the understanding of science processes for student achievement.…

Cognitive and affective outcomes of a class visit to a participatory science museum were examined by comparing responses of 416 fifth and sixth graders randomly assigned to four conditions (control, exhibit, lesson, exhibit followed by lesson) and two tests (verbal and visual). Results and implications for science education are presented.…

Determined whether significant differences exist in cognitive achievement and in the level of acquisition of practical skills among ninth-grade students (N=1025) in cooperative, competitive, and individualistic learning conditions in science laboratories. Results are discussed in terms of their implications for more productive science laboratory…

Explored the effects of learning on structural modifications to the periodic table; the location of a periodic table within instructional materials; and the presence of a two-page schema showing relationships between the topics explained in the written materials and the periodic table. Results obtained from 160 students are reported and discussed.…

Examined the problem-solving performances of novices (11 undergraduates) and experts (9 graduate students and instructors), comparing them in terms of background expertise and problem-solving success. Also examined problem-solving behaviors reported in other domains and determined whether or not genetics is a fruitful area for problem-solving…

This descriptive study was conducted to (1) measure anxiety levels of geology students (N=49) and earth science students (N=68) about taking these required departmental courses; (2) measure their general anxiety level; and (3) examine factors associated with student anxiety. Results (including those related to sex differences) are reported and…

Determined the effects of questions on the learning of 55 undergraduate education majors from case exhibits associated with a "walk-through" museum exhibit. The case exhibits contained diagrams, some specimens, a large amount of written material, but no questions. Also compared the effects of experimenter generated questions versus subject…

Determined (in separate studies conducted during 1977-78, 1978-79, 1979-80, 1980-81) what changes in teachers' anxiety about teaching science occurred as preservice elementary teachers completed science courses designed to meet their professional needs. Significant findings from these studies (which used the State-Trait Anxiety Inventory) are…

Results of this study confirm discrimination of the intensive time-series design and indicate that it can be used to distinguish differences in learning (comprehension and knowledge) between eighth-grade earth science students (N=95) having formal cognitive tendencies and those having concrete cognitive tendencies. (JN)