The relation between size and apparent heaviness

Attention, Perception, & Psychophysics - A formula for the size-weight illusion was derived from the Stevens and Rubin (1970) finding that heaviness functions form a family of power functions...     

Annoyance, type and duration of postannoyance activity, and aggression: the "cathartic effect".

A series of experiments was conducted to elucidate the conditions conductive to a decrease in aggression following annoyance. The potential capacity of expression of aggression to bring about a reduction in the amount of subsequent aggression was of particular interest. This empirical concern was supplemented by tests of several influential and competing theoretical concepts dealing with the cathartic aspects of human aggressive behavior. Given the failure of such concepts to account for major portions of the data, an integrative theoretical model was proposed. experiment 1 evaluated the usefulness of the hydraulic, self-arousal, and dissipation of anger concepts in accounting for the earlier demonstrations of the cathartic effect. In a 2 x 3 x 2 design, half of the subjects were annoyed by a confederate, while the other half were treated neutrally. During the next stage (the interpolated period), a third of all subjects gave "shocks" to the confederate, another third simply waited, while the remaining third worked on mathematical problems. Orthogonal to the first two facotrs was the duration of the interpolated period (7 to 13 min). The main dependent measure was the number of shocks administered to the confederate in the final stage of the experiment. It was found that annoyed subjects gave more shocks than nonannoyed ones did, and that only the former were substantially affected by other manipulations. In the case of the annoyed wait and annoyed math subjects, the anger dissipation hypothesis correctly predicted that the mere passage of time would decrease the amount of subsequent aggression, presumably due to the action of homeostatic processes. The self-arousal hypothesis correctly predicted that the annoyed math subjects would give fewer shocks than the annoyed wait ones would. Since the subjects were engaged in an absorbing activity, the likelihood of their arousing themselves by ruminations about the preceding annoying incident was minimized, and the amount of subsequent aggression reduced. Yet, when annoyed subjects had given the confederate a moderate number of shocks in the interpolated period, they subsequently gave him fewer shocks than the 7-min annoyed wait and annoyed math subjects; this was the only outcome predicted correctly by the hydraulic model. In contrast, when a large number of shocks had been administered in the interpolated period, the amount of subsequent aggression was relatively high. The interpretation of the latter result in terms of an "adaption effect" was tested by further experiments.     

Book reviews

DIMSOND, S. The Double Brain. Edinburgh: Churchill Livingstone. 1972.Pp. 229. £ 3.50.

ANDERSON, J. R. and BOWER, G. H. Human Associative Memory. Washington: V. H. Winston and Sons. 1973. Pp. 524. £ 8.55.

SOMMERHOFF, G. Logic of the Living Brain. London: John Wiley and Sons. 1974. Pp. 413. £ 5.75.

KLAUSMEIER, H. J., GHATALA, E. S. and FRAYER, D. A. Conceptual Learning and De-velopment. London: Academic Press. 1974. Pp 284. £ 7.00.

RATCLIFF, F. (ED.) Studies on Excitation and Inhibition in the Retina. A Collection of Papers from the Laboratories of H. Keffler Hartime. London: Chapman and Hall. 1974. Pp. 668. £ 8.50.

ROCK, I. orientation and Form. London: Academic Press. Inc. (London) Ltd. 1973-Pp. 165. £ 5.60.

BOWER, T. G. R. Devolopment in Infancy. Reading: W. H. Freeman and Co. 1974. Pp. 258. £ 2.90

CONNOLLY, K. J. and BRUNER,J. S. (Eds). The Growth of Competence. London: Aca-demic Press. 1974. Pp. 327. £ 6.80.

PIAGET, J. and INHELDER, B. (Translated by POmerans, A.) The Child's Construction of Quantities. London: Routledge and Kegan Paul. 1974. Pp. 285. £ 5.75.

GARNER, W. R. The Processing of Information and Structure. Potomac: Lawrence Erlbaum Associates. 1974. Pp. xi + 203. £ 6.00.

CARTERETTE, E. C. and FRIEDMAN, M. P. (Eds). Handbook of Perception. Vol. III. Bilogy of Perceptual System. London: Acadmic Press, Inc. (London) Ltd. 1973. Pp. 521. £ 00.00.     

Matching to successive samples: A multiple-unit memory task with rhesus monkeys

The delayed matching-to-sample task was extended to a multiple-unit memory procedure for nonhuman primates by increasing the number of samples shown in succession prior to the matching test. Rhesus monkeys were capable of reconstructing the order of presentation of three successively presented samples. The task is seen as an animal analogue of human memory tasks.     

The influence of texture on judgments of slant and relative distance in a picture with suggested depth

Six surfaces from natural environments with different visual textures were photographed at angles of 60, 65, and 70 deg from perpendicular. Measurements were taken of 24 Ss’ judgments of the inferred angles of slant and inferred midpoints of the six textured surfaces represented in the photographs which were viewed in the frontoparallel plane. Judgments of both slant and relative distance within the photographs were influenced by represented angle of slant and by variations in surface texture.     

Sequential dependencies and regression in psychophysical judgments

A tendency for judgments of stimulus magnitude to be biased in the direction of the value of the immediately preceding stimulus is found in magnitude estimations of loudness. This produces a bias in the empirical psychophysical function that results in underestimation of the exponent of the unbiased function presumed to relate number and stimulus intensity, N = aSⁿ. The biased judgment can be represented as a power product of focal and preceding stimulus intensity, N_ij= aS ^m S_j ^b. A bias-free estimate of the correct exponent, n, can be obtained from the relation n = m + b.     

Variations in size judgements as a function of surface texture

Adult subjects made monocular size judgements in two experiments in which the independent variables of surface texture and restrictions on viewing conditions were manipulated. Texture density gradients of stimulation had a significant influence of size judgements only under the less reduced conditions of observation when subjects could see other textured surfaces beyond the surfaces over which judgements were made. Identical manipulations of surface texture had earlier been found to have a highly significant influence on relative distance judgements (Newman, 1971). The principally negative results were thus taken to imply that subjects extract different information from the texture density gradient when judging size from that extracted when judging relative distance.     

SCV-A general subroutine for the selection of combinations of variables

SCV is a FORTRAN IV subroutine for sequencing combinations of variables. Selection of the combinations can be random with or without replacement and with equal or unequal frequencies of occurrence. Application is illustrated in terms of an interactive process-control experiment, but the subroutine is applicable to any problem requiring the generation of multidimensional sequences or the permutation of a set of numbers.