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The effects of 3 schedules of reinforcement (continuous, fixed-ratio 50%, and variable-ratio 50%), scholastic aptitude, and level of autonomy need upon achievement in a programed psychology course were investigated using 219 students. Measures used were (1) errors made on a criterion test on the...
A demonstration of the serial-position effect on spelling errors has been reported by Jensen. However, the determinants of this effect are ambiguous. The purpose of this study was to determine the nature of the serial-position error curve when scoring procedures and placement of difficult letter...
81 classes of 5th-grade students were exposed to 1 of 4 treatments: no forewarning, only positive forewarning, only negative, or both positive and negative. Following independent visual projections of an 8 nonsense-word list, a 2-response selective spelling test was administered. The sequence of...
A concept attainment experiment was performed on 24 college-aged Ss. Each S attained 3 successive conjunctive concepts. Under investigation was the hypothesis that E's invalidations of S's concept hypotheses had the effect of punishment on subsequent hypothesis-offering behavior. Invalidations...
Representing an investigation of hypotheses concerning: (1) interaction between creativity and IQ as they affect achievement, and (2) IQ thresholds where creativity begins to affect achievement and where IQ itself has no further effect, the study involved 609 6th-grade pupils (IQ range 70-162),...
In an investigation of instructional treatment by learner-variable interaction, 437 college Ss were divided between filmed and live physics lecture demonstrations. Immediate- and delayed-recall criteria were applied. Using prior knowledge of physics and 14 other learner characteristics as...
The effect of stimulus similarity on ease of concept attainment was investigated using 2 sets of materials which differed only in the degree of similarity among the specific values on each dimension, the values in 1 set differing more markedly than in the other. Materials consisted of various...
A training procedure employing programed-instruction techniques was used to teach high-IQ 1st graders to solve problems by varying each factor in succession while holding all other factors constant. On training tasks presented again later to test retention, the trained group (N = 30) solved more...
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