Age- and task-related differences in the use of category-size information for the retrieval of categorized items

Both the accuracy of category-size information and its use during the retrieval of categorized materials were investigated among kindergarten (5-year-old) and third-grade (8-year-old) children. Subjects were asked for free recall of a 34-item, categorized list wherein eight categories contained varying numbers of items. Subjects recalled items under either limited-time or unlimited-time conditions. Additionally, subjects were tested under one of three instructions: they were provided with the size of each category (Informed group), they were asked to estimate the size of each category (Estimation group), or they were given standard free recall instructions. Analysis of both the amount recalled and intercategory pause times indicated that third-graders' use of category size information was spontaneous, while kindergartners used the size information only when explicitly provided with it or asked for size estimates. Also, kindergartners' estimates of category size were much more in error than those of third-graders, although both groups erred on the side of underestimation. Importantly, when recall time limitations made the use of exhaustive category search less appropriate, third-graders were more apt to modify their search strategies.     

A study of the “central life interests” and “work attachments” of male and female workers

This paper reports the results of a survey undertaken to investigate the overall central life interests and attachments to work of a sample of 1112 male and female employees of six Southern California manufacturing firms. The major conclusions suggested by this study are three. First, male employees have a slight tendency to be more work oriented in their overall central life interests than female employees. Second, female employees tend to be more strongly attached to extrinsic work features than male employees. Third, male-female differences in occupational status and perceived mobility opportunities probably account for gender differences in overall central life interests but these variables do not account for the tendency for women to be more strongly attached than men to extrinsic work features.     

Self-esteem,race, and job satisfaction

The present study investigated relationships between self-esteem (SE) and job satisfaction among black and white employees. The sample consisted of 523 (45% black) employees of a large, urban school system. There was a positive relationship between SE and job satisfaction for members of both racial groups. In addition, the correlation between need satisfaction and job satisfaction was stronger for high SE persons than for low SE persons. The relationships between two social reference variables (the perceived satisfaction of other employees and improved standard of living) and job satisfaction were, as predicted, stronger for low SE whites than for high SE whites. Among blacks, however, the social reference variables were strongly related to job satisfaction regardless of level of SE.     

A case study approach to delivering and evaluating services by a school psychologist

Two interrelated problems in delivering school psychological services by one school psychologist acted as a motivating force behind this study: the problem of how to plan and render services to a school system where the ratio of students to school psychologists is high, and the problem of how to determine the degree of effectiveness of these services. This study describes an approach which consisted of three distinct services rendered by a school psychologist. Evaluative measurements of the services were made in two areas: the effect of the services on the ongoing operations of the system, and the evaluation of the services by school personnel exposed to the services directly or indirectly. The relative merits and the limitations of such an approach are discussed.     

Blocking of a taste aversion by prior pairings of exteroceptive stimuli with illness

Although rats preferentially associate gustatory stimuli with illness, this does not imply that other types of stimuli cannot be associated with illness. In Experiment 1, rats consuming tap water in a distinctive environment prior to illness subsequently suppressed ingestion in that environment, whereas rats poisoned or injected with saline 10 hr later did not. It was also found that rats poisoned after drinking saccharin in the environment paired with illness developed weaker saccharin aversions than identically trained rats which drank saccharin in a different location. In Experiment 2, degrading the correlation between injection-related cues and illness by interpolating saline injections between LiCl preexposures attenuated the decremental effects of illness preexposure. The strength of the exteroceptive cue-illness associations observed in these studies suggests that theories based on evolutionary arguments are not the most appropriate frame of reference for analyzing stimulus selection in poison-induced avoidance.     

Optimal scaling of paired comparison and rank order data: An alternative to guttman's formulation

A formulation, which is different from Guttman's is presented. The two formulations are both called the optimal scaling approach, and are proven to provide identical scale values. The proposed formulation has at least two advantages over Guttman's. Namely, (i) the former serves to clarify close relations of the optimal scaling approach to those of Slater and the vector model of preferential choice, and (ii) in addition to the stimulus scale values, it provides scores for the subjects, which indicate the degrees of response consistency (transitivity), relative to the optimum solution. The method is assumption-free and capable of multidimensional analysis.This study was partly supported by the National Research Council Grant (No. A4581) to S. Nishisato. The author is indebted to Dr. Bert F. Green, Jr., Mr. Tomoichi Ishizuka, and anonymous reviewers for their valuable comments on an earlier draft.     

Modeling spatial knowledge

A person's cognitive map, or knowledge of large-scale space, is built up from observations gathered as he travels through the environment. It acts as a problem solver to find routes and relative positions, as well as describing the current location. The TOUR model captures the multiple representations that make up the cognitive map, the problem-solving strategies it uses, and the mechanisms for assimilating new information. The representations have rich collections of states of partial knowledge, which support many of the performance characteristics of common-sense knowledge.     

Some relations of general intelligence and selective attention

General intelligence may set structural feature limitations on three aspects of selective attention: direction, adjustability, and breadth. Amiable hypotheses considered are that subjects of varying intelligence may (1) have some partially fixed tendencies to look at different dimensions of stimuli, (2) have varying rates of adjusting their direction of attention, and (3) have varying upper limits on breadth of attention for tasks demanding it. Data, theory, and methods bearing on these hypotheses were reviewed from the domain of visual discrimination learning.