The effect of target specification on objects fixated during visual search

When a person searches for a target in a cluttered visual field his eye fixations typically fall on objects. The effect of target specification on the probability of fixating different classes of objects was studied. For fields containing objects differing widely in size, color, and shape: a high proportion of searchers’ fixations were on objects of a specified color, a moderate proportion of their fixations were on objects of a specified size, and a s light proportion of their fixations were on objects of a specified shape. When two or more target characteristics were specified, fixations were generally based on a single characteristic. It is proposed that the specification of a target creates a perceptual structure which the searcher explores. The study of visual fixations, in effect, is the study of the perceptual structure.     

Has apparent size been tested as a factor in figural after-effects?

This experiment was designed to demonstrate that the effect of apparent size on the FAE has not been adequately tested. The subjects were run under binocular and under monocular viewing conditions. Binocular vision gave essentially the same results that had been obtained in previous binocular investigations. Monocular vision gave different results. It was concluded that the effect of apparent size on the FAE has not been demonstrated.     

Developmental aspects of memory for spatial location

The purpose was to show whether or not the encoding of location met criteria defining an automatic process (L. Hasher & R. T. Zacks, 1979, Journal of Experimental Psychology: General, 108, 356-388; 1984, American Psychologist, 39, 1372-1388). Among other criteria, automatic processes are not expected to show developmental changes beyond an early age, to be unrelated to intelligence level, and to be unaffected by instructions. In the first experiment preschool through sixth-grade children were compared on a 40-picturebook task following incidental (remember the names of pictures) or intentional (remember location) instruction. Subjects viewed and named pictures in sets of four, arranged in quadrants in the opened book, and then attempted to recall names of the objects pictured and to relocate pictures on blank pages. In the second experiment, second and sixth graders, college students, elderly persons, and mentally retarded persons were compared on a 60-picturebook task following either incidental or semantic incidental instructions (give the function of objects pictured). Memory for location was invariant across age groups and intelligence level. The only exception was that 3 and 4 year olds were more accurate following intentional instructions. Otherwise there were no differences between intentional and incidental instructions. Semantic instructions resulted in slightly more accurate locations. The results were interpreted as supportive of the Hasher and Zacks' automaticity hypothesis.     

The MCMI as a measure of DSM-III

The Millon Clinical Multiaxial Inventory (MCMI) has been interpreted as a measure of DSM-III disorders. However, the MCMI was constructed and validated primarily as a measure of Millon's (1969, 1981) taxonomy, not DSM-III. Comparison of the two taxonomies and examination of the MCMI's content validity for two of the MCMI scales indicate only a partial congruence between the Millon and DSM-III taxonomies. There has been no published empirical research concerning the relationship between the MCMI and DSM-III, and the derivation and cross-validation research for the MCMI scales employed Millon's taxonomy and not DSM-III. It is suggested that until such data have been presented one should be cautious in one's interpretation of the MCMI as a measure of DSM-III disorders.     

An investigation of the nomological network of social interest

This paper presents the results of three studies relating a composite measure of social interest to numerous variables within the nomological network of social interest. Study 1 found that social interest is positively related to sex-role femininity, androgyny, positive ambition, other-centered life goals, and, surprisingly, sex-role masculinity. Study 1 also found social interest negatively related to a narcissistic life goal, personality rigidity, and negative interpersonal behavior (Drivenness). Study 2 correlated social interest with the Personality Research Form and found, as expected, that social interest is correlated with the Affiliation and Nurturance scales. Unfortunately, social interest was not negatively related to Aggression. Finally, Study 3 provided generally positive support for the hypothesized relationships between social interest and several variables from the Life Styles Inventory (e.g., Humanism, Affiliation, etc.). Implications of the results for the construct validity of Adlerian social interest theory and current measurement of social interest are presented.     

Movement refractoriness: The influence of response structure and speed

In the first experiment, refractoriness of a primary arm swing was studied using two movement speeds and three secondary responses (reversal, contralateral and ipsilateral thumb-lift). Pre-movement inter-stimulus intervals were 100, 200 or 300 msec and response-stimulus intervals ranged from zero to 200 msec. Accelerometers provided kinematic data. The second experiment repeated the reversal condition with the addition of EMG analysis.The prediction that the maximal speed condition would show a general intensification of control processes, and thus less refractoriness as compared to submaximal speed, was upheld for all response conditions. The findings also supported the prediction that the pattern of refractoriness depends on the functional relationships of the muscles concerned.The EMG analysis revealed that while the sequencing of muscle action was unchanged with movement speed, its phasing characterized the shifts in response metrics. The overall findings emphasize the need to view the refractoriness phenomenon in the context of anatomical and mechanical consequences of force changes in controlling limb movement as they interact with intentional command.     

Effects of modeling and videotape feedback with knowledge of results on motor performance

On the basis of social learning theory it can be hypothesized that information acquired through model observation can provide as rich a basis for a cognitive representation as that acquired by means of the usual KR procedure. A source of external information similar to that of model observation is videotape feedback (VTFB). Therefore, it was the purpose of this study to test the potency of these two sources of information with KR. The design was a 4 (groups) × 10 (blocks) factorial ANOVA with repeated measures on the last factor. Both immediate transfer and 48-hr retention effects were assessed. The immediate transfer analysis indicated a significant main effect for group. This effect appeared to be due to the poor performance of the VTFB group. The same effect approached significance after the 48-hr retention. Subsequent variance analysis indicated significant differences between transfer and retention within all conditions except modeling.