Paper based on PhD dissertation submitted to the University of Kansas. Research supported by Public Health Service Grant No. 5-FI-MH-30, 582-02.

Students' reported inner speech during mathematics problem solving was studied. Subjects from grades three to six were assigned to low-task or high-task difficulty groups. Between problems, students reported their inner speech. Both groups maintained an adaptive task-oriented problem-solving stance, with positive affect toward self. (Author/GDC)

Examines the relationship between development of logical processes required in deductive reasoning and their use by preschoolers, also considering possible explanations for children's deductive reasoning. The relationship of problem content to real-world knowledge and the sequence of presentation of problem types were found to affect the display…

Seven experiments were performed to address three issues: prose decisions of different levels of difficulty, directed attention effect, and the effects of decisions on memorability of prose among relatively good and relatively poor readers. (Author/PN)

Shows that, contrary to Piagetian Theory, formal thought in a variety of subject matters is not possible until sufficient requisite concrete background experience in each content area involved has been attained. (MH)

A distinctiveness of encoding hypothesis, as applied to the facilitative effects that higher order objectives have on readers' prose recall, was evaluated in three experiments. Results suggest that distinctiveness of encoding may offer a theoretical basis for the effects of adjunct aids as well as a guide to their construction. (Author/GK)

It was hypothesized that the concept of cognitive effort in memory is both useful and important. Cognitive effort was defined as the engaged proportion of limited- capacity central processing. Four experiments were conducted, and the implications and potential applications of the concept were discussed. (Author/MH)

One hundred eighteen college students studied a passage as a knowledge map or as traditional text. Half studied already color-coded material, and half color coded the material themselves. Results support effectiveness of knowledge maps and indicate the role of test anxiety in mediating outcomes associated with demanding tasks such as color coding.…

This article examines the relationship of cognitive processing and creativity and argues that educational interventions contribute to the development of creative thinking skills when they provide requisite knowledge structures and stress controlled application of these processes in solving progressively more complex problems. (DB)

This study compared 24 adult stutterers and 24 nonstutterers for response initiation and completion times on manual task conditions varying as to decision complexity. It was concluded that response planning and organization deficits in stutterers are independent of decision complexity but related to spatial and temporal coordination. (Author/DB)

Switching between tasks produces decreases in performance as compared to repeating the same task. Asymmetrical switch costs occur when switching between two tasks of unequal difficulty. This asymmetry occurs because the cost is greater when switching to the less difficult task than when switching to the more difficult task. Various theories about…

This study sought to investigate whether the abnormally small P3 amplitudes observed in pervasive developmental disorder (PDD) are related to differences in processing capacity. PDD children and adolescents and their control groups participated in the study. Visual probe stimuli were presented during an auditory task with two levels of difficulty.…

Based on a previously validated cognitive processing model of reading comprehension, this study experimentally examines potential generative components of text-based multiple-choice reading comprehension test questions. Previous research (Embretson & Wetzel, 1987; Gorin & Embretson, 2005; Sheehan & Ginther, 2001) shows text encoding and decision…

Prior exposure to drugs of abuse has been shown to occlude the structural plasticity associated with living in a complex environment. Amphetamine treatment may also occlude some cognitive advantages normally associated with living in a complex environment. To test this hypothesis we examined the influence of prior exposure to amphetamine on fear…

To understand the difficulties that many students have with comprehension of mathematics, we must determine the cognitive functioning underlying the diversity of mathematical processes. What are the cognitive systems that are required to give access to mathematical objects? Are these systems common to all processes of knowledge or, on the…