Resource-Allocation Behavior in Complex but Commonplace Tasks

We all face resource-allocation tasks, yet little is known about how people make resource-allocation decisions. Three earlier papers (Langholtz, Gettys, & Foote, 1993, 1994, 1995) established that people can intuitively solve technical two-dimensional resource-allocation problems, where allocations are made on a continuous scale, reaching solutions that approach the optimum solution determined with Linear Programming (LP). In this research we expand our understanding of how people make resource-allocation decisions by examining how people perform complex but commonplace problems using a discrete scale where optimal solutions are determined with Integer Programming. We also contrast performance under conditions where progressively unequal scheduling is required to reach the optimum solution. The data show people can achieve solutions that provide most of the payoffs found with LP, even when they are faced with a complicated three-dimensional problem, but there is a tendency toward equal scheduling under all conditions.     

The effects of effort toward comprehension on recall

Four experiments examined free recall of generally incomprehensible sentences with appropriate cues that made the sentences comprehensible. A distinction is made between processes involved in an effort toward comprehension and elaboration processes that occur following comprehension. It was found that providing additional time for effort toward comprehension enhanced recall, while providing additional time for elaboration following comprehension did not enhance recall. It was also shown that the effects of effort toward comprehension were contingent upon eventual understanding of the sentence.     

Systems approach to the concept of niche

Conclusion The systems approach to niche presented herein stands as an example of the unifying potential of mathematical system theory when applied to concepts and principles of ecology. Beginning with subjective concepts from the naturalistic tradition, the niche was framed in the formalism of general system theory. So modeled, it appeared as a restriction of a more general construct, the environ. Both niches and environs are implementable in the context of ecosystem models, and with the growing ability of ecologists to construct such models, system theoretic niches and environs both should serve in the future to clarify old problems of ecology, and make it possible to raise new classes of problems. The nature of niches, always difficult conceptually for the ecologist, may now give way to further development, both theoretical and empirical.     

Partial Reinforcement in a Bar-Pressing Situation with Preschool Children

Forty fifth- and sixth-grade children were given a list of names which they had prerated for Reinforcement Value in a free recall format. The prediction was made that high self-esteem children will learn their liked names more rapidly than their disliked names, but that low self-esteem children would show the reverse tendency. Although an RV-positive effect is noted in the sample, the expected reversal did not occur. A confounding factor proved to be intelligence, since it was impossible to divorce self-esteem from IQ in the sample investigated. The presentation closes with a discussion of the “logical learning theory” on which RV study is based, and the implications that this theory has for the role of self-induced behavior.     

Units of episodic memory in perceptual recognition

Two studies examined the cognitive units of sentence memory using a perceptual recognition task. Four candidate cognitive units were considered: concepts, propositions, integrated propositions, and nonintegrated propositions. Subjects first received a list of acquisition sentences and then were asked to reproduce sentences presented under a white-noise mask. These masked sentences were replicas of the acquisition sentences, were formed of recombined clauses from the acquisition sentences, or were formed of recombined words from the acquisition sentences. Reproduction accuracy was employed as the dependent measure. Results supported propositions (operationalized by clauses) as cognitive units of episodic memory. No conclusive evidence was obtained for concepts, integrated propositions, or nonintegrated propositions as cognitive units. The utility of perceptual recognition tasks for studying the cognitive units of episodic memory is discussed.     

Quantitative Studies of Verbal Reinforcement in Classroom Situations: II. Occurrence of Error and Correct Responses Related to a Change in Stimulus Conditions

This study explores the representational processes underlying the young child's creation of the human figure, and examines the developmental origins, effects of socioeconomic status, IQ, age, sex, and function of verbalization to the task. Tasks were selected which required extensive use of symbolic processes and consisted of human figure drawing, figure completion, two form puzzles composed of geometric forms, and drawing on dictation. Ss were 151 preschoolers ranging in age from 2.3 to 5.7, enrolled in a day care center or nursery school. Ss came from two distinct socioeconomic backgrounds: upper-middle and working-class families. The study revealed the sensorymotor origins of representation and pointed toward an autonomous, perhaps universal, development of these representational processes. The results indicated major effects of IQ and age, minor effects of sex, and the absence of socioeconomic status effects on the five tasks. Achievement scores and the child's verbalization to the tasks suggested that the function of verbalization is explanatory rather than problem solving.     

Effort toward comprehension: Elaboration or “aha”?

Auble and Franks (1978) found that a process termed “effort toward comprehension” was important in facilitating recall of sentences. Four experiments were conducted to further elucidate the nature of this process. Two hypotheses were considered: (1)Effort toward comprehension involves greater elaboration or deeper processing of the sentence; (2)effort toward comprehension can be viewed as an “aha” experience (i.e., a state of noncomprehension followed by comprehension of the sentence). Results indicated that recall was significantly greater for subjects in conditions producing “aha” reactions. No support was found for the elaboration interpretation of effort toward comprehension.