Developmental study of a haptic illusion in relation to Piaget's centration theory.

Age differences have previously been found in the magnitude of the visual Horizontal-vertical illusion with an L figure. The present study examined the haptic judgments of an L figure among subjects across the ages of 6, 7, 9, 11, 12, 13, and 20 years. Significant differences in amount of haptic illusion were found. The developmental function was curvilinear, decreasing from the 6-year-olds to 7-year-olds, and then increasing from 7-year-olds to a peak among 11-year-olds, followed by a decline to adulthood. Variation in the size of the illusion was also found to be related to the rate at which subjects of a particular age group typically move the limb in scanning the figure. The similarity of the haptic function to that obtained previously for the visual L figure was discussed in relation to Piaget's Centration theory.     

Book reviews

SANDERS, A. F. (Ed.). Attention and Performance III. Amsterdam: North Holland Publishing Company. 1970. Pp. viii + 442. (Price not known.)

CORCORAN, D. W. J. Pattern Recognition. Harmondsworth: Penguin Books Ltd. 1971. Pp. 223. £0.50.

SCHRIER, A. M. and STOLLNITZ, F. (Eds.) Behaviour of Nonhuman Primates Vol. III. New York: Academic Press Inc. 1971. £4.45.

KINTSCH, W. Learning, Memory, and Conceptual Processes. New York: Wiley and Sons. 1970. Pp. 498. £4.40.

MORTON, J. (Ed.) Biological and Social Factors in Psycholinguistics. London: Logos Press. 1971. Pp. 215. £3.50.

RITCHIE RUSSELL, W. The Traumatic Amnesius. London: Oxford University Press. Pp. 84. £2.00.

MILLER, N. E. Selected Papers. Chicago: Aldine Publishing. 1971. Pp. 874. £15.00.

SUTHERLAND, N. S. AND MACKINTOSH, N. J. Mechanisms of Animal Discrimination Learning. New York: Academic Press. 1971. Pp. 559. $18.50.

FURCHTGOTT, E. (Ed.). Pharmacological and Biophysical Agents and Behavior. New York: Academic Press. 1971. Pp. xii+402. $14.50.

EYSENCK, H. J., ARNOLD, W. AND MEILI,R. (Eds). Encyclopedia of Psychology. Volume I. London: Search Press. 1972. Pp. 396. £8.00.     

Effects of a checklist on self-assessment of blood glucose level by a memory-impaired woman with diabetes mellitus

This study evaluated effects of a checklist on the accuracy of self-assessment of blood glucose level by a diabetic woman with memory impairments caused by viral encephalitis. The checklist consisted of 54 steps for operating an electronic glucometer, which the subject performed in sequence and checked off when completed. Following introduction of the checklist, the percentage of steps completed correctly increased in simulated and actual blood glucose tests and yielded clinically useful information.     

Cross‐cultural similarities and differences in the theoretical predictors of cyberbullying perpetration: Results from a seven‐country study

The Barlett Gentile cyberbullying model (BGCM) posits that correlated anonymity perceptions and the belief in the irrelevance of muscularity for online bullying (BIMOB) predict positive cyberbullying attitudes to predict subsequent cyberbullying perpetration. Much research has shown the BGCM to be the only published theory that differentiates traditional and cyberbullying while validly predicting cyberbullying. So far, however, the cross‐cultural ubiquity has gone understudied. Thus, 1,592 adult participants across seven countries (USA, Australia, Brazil, China, Germany, Japan, and Singapore) completed measures germane to the BGCM. Supporting the BGCM, the variables were significantly correlated for the entire sample, participants from independent cultures, and participants from interdependent cultures. However, the relationship between BIMOB and positive cyberbullying attitudes as well as the relationship between positive cyberbullying attitudes and cyberbullying perpetration were stronger for independent cultures. These results suggest that the BGCM postulates are mostly universal, but several relations appear to be culturally different. Theoretical implications are discussed.     

The benefits of need satisfaction depend on their relative importance for people with a unidimensional identity: an idiographic analysis

Motivation and Emotion - Self-determination theory proposes that the satisfaction of basic psychological needs is equally beneficial for everyone – the Universal Hypothesis. Equally, there...     

Mobilizing cause supporters through group‐based interaction

Collective action expresses group‐based identities, formed by supporters seeking to further particular social causes. While the development of groups linked to action necessitates interaction among supporters, little research has examined how these groups form. Utilizing responses of supporters who participated in 1 of 29 action‐planning sessions, this research presents an initial attempt to identify the ingredients important to this process. It shows that to the extent that the actions agreed on in the course of group interactions were seen as capable of making a difference (action efficacy), and worthy of public expression (action voice), supporters’ group‐based identification was enhanced. This in turn increased their willingness to engage in collective action. Practical implications and avenues for future research to understand the mobilization process are discussed.