Reaction time measures of feature saliency in schematic faces

Two separate paradigms utilizing measurements of reaction time were employed to study facial feature saliency in schematic line drawn faces. In the first paradigm the speed of response to the omission of different facial components was measured, and in the second, the speed of response to feature substitution was measured. In both paradigms the facial features were presented in a random temporal sequence in order to minimise preferential scanning strategies. The two separate paradigms reflected the feature hierarchy most commonly found in the literature, ie the outline and eyes are more salient than the nose and mouth in terms of both speed of processing and error rate. In a third study the feature substitution paradigm was used to investigate the effects of feature saliency on the perception of emotional faces. The results suggest a change in the eyes/mouth hierarchy so that the mouth becomes the most salient feature in the surprised, happy, and sad target faces. This reverse in hierarchy, however, was not evident with the angry target face. These results are discussed in terms of changes in the focus of 'attention' and/or changes in 'processing efficiency'.     

Polarizing effects of intergroup comparison

Compared the effects of intergroup and within-group comparison on attitudes differentiating two well-defined student groups. Social work students (n = 48) expressed attitudes either before or after estimating ingroup or outgroup (commerce students) norms. Subjects adopted more extreme attitudes following outgroup comparison, but were unaffected by comparison within the group.     

Development of the auditory orientation response in the albino rat (Rattus norvegicus)

The development of head orientation to auditory stimulation was examined in rat pups at Postnatal Days 8, 11, 14, 17, and 20. The animals were tested in a quiet environment with single bursts of 65 dB (SPL) broad-band noise. A reflexive head turn toward the sound was first seen on Postnatal Day 14 and subsequently on Days 17 and 20. This result demonstrates that the onset of directional auditory responses occurred between Day 11 and Day 14. The role of binaural cues in early sound orientation was examined in 17-day-old pups with monaural ligation of the external meatus. These animals were unable to localize a sound source and consistently turned toward the side of the unligated ear regardless of the position of the stimulus. Thus binaural cues were shown to be important for head orientation to sound in early development. In a separate study, head orientation to high and low frequency tone pips was examined. Directional responses were first seen on Day 12 for a 16-kHz tone and Day 14 for a 2-kHz tone. These results indicate an earlier onset for orientation to high frequency sounds in the rat.     

Book reviews

Postman, L. And Keppel, G. (Eds.). Norms of Word Association. New York and London: Academic Press. 1970. Pp. vi+ 467. £12.00.

Wolstenholme, G. E. W. and Knight, J. (Eds.). Taste and Smell in Vertebrates. London: J. & A. Churchill. 1970. Pp. x + 402. £4.00.

Tobias, J. V. (Ed.). Foundations of Modern Auditory Theory, Vol. I. New York and London: Academic Press. 1970. Pp. xv + 466. £10.50.

Hexmelin, B. and O'connor, N. Psychological Experiments with Autistic Children. Oxford: Pergamon Press. 1970. Pp. 142. £3.00.

Black, P. (Ed.). Physiological Correlates of Emotion. New York and London: Academic Press. 1970. Pp. xvi + 309. £6.30.

Baird, J. C. Psychophysical Analysis of Visual Space. Oxford: Pergamon Press. 1970. Pp. viii + 321. £4.50.

Flores D'Arcais, G. B. and Levelt, W J. M. (Eds.). Advances in Psycholinguistics. Amsterdam and London: North Holland. 1970. Pp. x + 454. £8.40.

Dodwell, P. C. Visual Pattern Recognition. Holt, Rhinehart & Wilson. 1970. Pp. 276. $9.00.

Gladwin, Thomas. East is a Big Bird. Oxford: University Press. 1970. Pp. 241. £4.75.

GULICR, W. L. Hearing: Physiology and Phychophysics. New York: Oxford University Press. 1971. Pp. viii+257. £4.50.

Plomp, R. and Smoorenburg, G. F. (Eds.). Frequency Analysis and Periodicity Detection in Hearing. Leiden: A. W. Sijthoff. 1970. Pp. xvi+482.

Jaffe, Joseph and Feldstein, Stanley. Rhythms of Dialogue. New York: Academic Press. 1970. Pp. 156. £3.95     

Knowledge and Error in Early Chinese Thought

Drawing primarily on the Mòzǐ and Xúnzǐ, the article proposes an account of how knowledge and error are understood in classical Chinese epistemology and applies it to explain the absence of a skeptical argument from illusion in early Chinese thought. Arguments from illusion are associated with a representational conception of mind and knowledge, which allows the possibility of a comprehensive or persistent gap between appearance and reality. By contrast, early Chinese thinkers understand mind and knowledge primarily in terms of competence or ability, not representation. Cognitive error amounts to a form of incompetence. Error is not explained as a failure to accurately represent the mind-independent reality due to misleading or illusory appearances. Instead, it can be explained metaphorically by appeal to part-whole relations: cognitive error typically occurs when agents incompetently respond to only part of their situation, rather than the whole.     

Synaesthesia: the prevalence of atypical cross-modal experiences

Sensory and cognitive mechanisms allow stimuli to be perceived with properties relating to sight, sound, touch, etc, and ensure, for example, that visual properties are perceived as visual experiences, rather than sounds, tastes, smells, etc. Theories of normal development can be informed by cases where this modularity breaks down, in a condition known as synaesthesia. Conventional wisdom has held that this occurs extremely rarely (0.05% of births) and affects women more than men. Here we present the first test of synaesthesia prevalence with sampling that does not rely on self-referral, and which uses objective tests to establish genuineness. We show that (a) the prevalence of synaesthesia is 88 times higher than previously assumed, (b) the most common variant is coloured days, (c) the most studied variant (grapheme-colour synaesthesia)--previously believed most common--is prevalent at 1%, and (d) there is no strong asymmetry in the distribution of synaesthesia across the sexes. Hence, we suggest that female biases reported earlier likely arose from (or were exaggerated by) sex differences in self-disclosure.     

Gender Differences in Sado-Masochistic Arousal Among College Students

This paper tests three competing explanationsfor male-female differences in sado-masochistic sexualarousal. The male arousal hypothesis posits that becauseof socialization that emphasizes sexual aggression and experimentation (and thus higher levels ofsexual arousal and activity in all areas), men will bemore aroused by both sadism and masochism than women.The female masochism hypothesis argues that because females are socialized to be passive, they willbe more aroused by masochistic (but not sadistic)activities than males. The convergence hypothesis notesthat male female socialization (and differences in most sexual attitudes and behavior) haveconverged in recent years, and hypothesizes that thesame convergence has taken place in arousal caused bysado-masochistic behavior and fantasy. Using a sample comprised of 320 undergraduate students (69%white, 27% African American, 4% other) from a largeurban university in the Southeast, we found no evidencefor the female masochism hypothesis and only weak evidence for the convergence hypothesis. Thestrongest evidence was for the male arousal hypotheses,with males scoring significantly higher than females onseven of the twelve measures of sado-masochistic arousal, and no differently from females on theremaining five.