Conditioning of a free operant in Octupus cyaneus Gray

Operant conditioning was studied in six specimens of Octopus cyaneus Gray. An “arm-out-of-water” operant, in which the octopus inserted an arm up a feeding-tube breaking the water surface, proved susceptible to reinforcement schedules. An apparatus was developed that provided automated reinforcement and recording. Performance was studied under continuous reinforcement, fixed-ratio and variable-ratio schedules, and extinction conditions.     

Book reviews

The Oxford Encyclopedia of the Modern Islamic World. John L. Esposito (Ed.), 1995. New York, Oxford, Oxford University Press. 4 vols, £295.00, ISBN 0 19 506613 8.

Deciphering the Signs of God: a phenomenological approach to Islam. Annemarie Schimmel, 1994. Edinburgh, Edinburgh University Press. 302 pp., hb. £39.50, ISBN 0 7486 0460 X.

The Rainbow of Faiths. John Hick, 1995. London, SCM Press. 160 pp., pb. £9.95, ISBN 0 334 02608 3.

Scholarly Approaches to Religion, Interreligious Perceptions, and Islam. Jacques Waahdenburg, (Ed.), 1995. Bern, Berlin, Frankfurt a. M., New York, Paris, Vienna, Peter Lang. 464 pp., hb. Sf76. (= £38), ISBN 3 906752 93 3.

Tariqat al‐Tahin al‐Balaghi wa al‐Tafsir. Roland Meynet, Louis Pouzet, Naila Farouki & Ahyaf Sinno, 1993. Beirut, Lebanon, Dar al‐Mashriq. 306 pp., pb. n.p., ISBN 2 7214 5003 4.

Religious Polemic and the Intellectual History of the Mozarabs, c. 1050–1200. T. Burman, 1994. Leiden, E. J. Brill. 407 pp., hb. np., ISBN 90 04 09910 7.

Justice, Courtesy and Love: theologians and missionaries encountering world religions, 1846–1914. Kenneth Cracknell, 1995. London, Epworth Press. 459 pp, pb. £20, ISBN 0 7162 0501 7.

Mission and Dialogue. Michael Nazir‐Ali, 1995. London, SPCK Press. 152 pp, pb., £8.99, ISBN 0 281 04810 X.

Early Mamluk Diplomacy (1260–1290): treaties of Baybars and Qalawun with Christian rulers. P. M. Holt, 1995. Leiden, E. J. Brill. 161 pp., hb. NLG 100, ISBN 90 04 10246 9.

The Search for Fundamentals: the process of modernization and the quest for meaning. Lieteke Van Vucht Tljssen, Jan Berting & Frank Lechner (Eds), 1995. Dordrecht, The Netherlands, Kluwer Academic Publishers. 293 pp., £80.00, 0 7923 3542 2.

Religion und prosoziales Verhalten Ein Symposion. Walter Kerber, (Ed.), 1995. Munchen, Kindt Verlag. 224 pp., hb. DM.36.00, ISBN 3 925412 18 2.

Nationalism, Ethnicity and Cultural Identity in Europe. (Comparative Studies in Migration and Ethnic Relations 1). Keebat von Benda‐Beckman & Maykel Verkuyten (Eds), 1995. Utrecht, European Research Centre on Migration and Ethnic Relations (ERCOMER). 199 pp., £11.95, ISBN 90 75719 01 9.

‘Das Projekt Weltethos’ in der Erziehung: Referate und Ergebnisse des Nurnberger Forums 1994. Johannes Lahnemann (Ed.), 1995. Hamburg, E.B. Verlag. 410 pp., pb. n.p., ISBN 3 923002 86 6.

Fundamentalism and Intellectuals in Egypt, 1973–1993. David Sagiv, 1995. London, Frank Cass. 188 pp., hb. £35, ISBN 0 7146 4581 8.

Being Human in Africa: toward an African Christian anthropology. Augustine C. Musopole, 1994. New York, Peter Lang. 261 pp., pb. n.p., ISBN 0 8204 2304 1.

Russians in the Former Soviet Republics. Paul Kolstoe with a contribution by Andrei Edemsky, 1995. London, Hurst & Company. 340 pp., hb. £35.00, ISBN 1 8065 206     

A comparison of “traditional” and “atypical” workers: Demographic,behavioral, and attitudinal differences

Differences among full-time (n=1066), part-time (n=132), and moonlighting employees (n=153) in a variety of occupations were examined. Moonlighters as compared to full-timers were younger, more frequently male, perceived less educational fit with their main jobs, and were primary wage earners. Full-timers as compared to part-timers were more frequently male, married, and primary wage earners. Part-timers had the greatest turnover, but no differences were detected for other withdrawal behaviors. Part-timers were more satisified with working conditions but were less satisfied with extrinsic rewards and life in general. Moonlighters expressed a stronger work ethic and placed less importance on working conditions.A version of this paper was presented at the 1991 Meetings of the Southwest Division of the Academy of Management in Houston, TX.     

Coordination dynamics of rhythmical and discrete prehension movements: Implications of the scanning procedure and individual differences

The aim of this study was to compare the coordination dynamics of discrete and rhythmical reaching and grasping movements from a dynamical systems perspective. Previous research from this theoretical perspective had focused on rhythmical actions and it is unclear to what extent discrete movements are amenable to a similar dynamical systems analysis. Six adult subjects performed prehension in two conditions: a discrete, non-continuous mode and a rhythmical, continuous mode. A `scanning procedure' was implemented between pre- and post-tests in which the required time of final relative hand closure (T_rfc) was systematically varied. It was shown that the error in the reaching and grasping pattern was least at an attractor region and systematically increased with deviation from the attractor. Results also indicated that there were no differences between condition or trial block for the group. However, there were several within-subject effects of interest. The validity of the scanning procedure was found to be questionable in the discrete condition, where four subjects showed differences in T_rfc between pre- or post-test and the predicted T_rfc of the scanning procedure. Four out of six subjects also had different preferred T_rfc values for discrete and rhythmical movement, indicating that individual specific models might need to be constructed for future dynamical modelling of discrete movement.PsycINFO classification: 2330     

Cree Conceptions of Cognitive Competence

The study of cognitive competence in various cultures has shifted from examining “general intelligence” (very often only in terms known to Western cultures), to a concern for indigenous conceptions of what it means to be a capable person in that culture. Ethnographic techniques elicited the range of Cree terms for such general competence. With a sample of 60 Cree adults in Northern Ontario (stratified by age and sex), we obtained card sorts for 20 terms (piles sorted on basis of similarity), and semantic differential ratings (on 12 bipolar adjective dimensions), for two of the terms. A two-dimensional solution was obtained using Multidimensional scaling. On one dimension there was a cluster of core terms (e.g. wise, thinks hard, pays attention, respectful, good sense of direction) at one end, and three other terms (stupid, crazy, “backwards knowledge”) at the other. On the second dimension, a pair of terms translated as “mentally tough” (with implications of perseverance, stamina, bravery) was at one end, and two other terms (understands new things, religious) were at the other. The term for “lives like a white person” was opposite the core cluster of terms for Cree competence. Ratings of the two terms (“wise” and “understands new things”), indicate that both are associated with: Taking time, good, hard-working, careful, patient, self-sufficient, strong, developing, bush-related, and easy to see. These results indicate some clear differences from Western notions of intelligence as being fast, analytic and without social or moral dimensions.     

Age and sex as factors influencing spontaneous exploration and object investigation by preadult rats (Rattus norvegicus).

This study examined developmental and sex differences in the exploratory and investigatory behaviors of Long-Evans rats (Rattus norvegicus). Littermate sextuplets were divided into sex-matched groups (at 30, 60, and 90 days of age) and were individually videotaped on 2 consecutive nights in an arena that contained stimulus objects. Multiple measures of locomotor exploration and object investigation increased significantly with age but were not influenced by sex. Older rats entered more quickly, were more active, spent more time in the arena, and spent more time investigating inanimate stimulus objects than did younger rats. Sex did not significantly affect most measures of open-field behavior; however, the data suggest that the sexes may begin to diverge by 90 days. These results suggest that preadult rats of both sexes are equipped early in development with similar strategies and repertoires for exploration and investigation.     

Ways of coping with excessive drug use in the family: A provisional typology based on the accounts of 50 close relatives

This paper outlines an eight-fold typology of coping actions based upon a qualitative analysis of the accounts provided by 50 close relatives of people with drug problems. In a number of different ways relatives draw attention to the contrasts between these distinguishable ways of coping. Emphasis is placed upon the provisional nature of this typology and upon the compromises between, and combinations of, ways of coping that are often used by relatives in practice. Different ways of coping represent alternative choices for relatives, often explicitly expressed by them as difficult dilemmas. Links are suggested between the ways of coping identified here and those discussed in the literature on coping with other disorders and disabilities in the family, with ways of coping described in the general literature on coping with stress, and with types of social action appearing in general models of interpersonal behaviour. Implications for counselling close relatives of people with drug problems are also outlined.     

Two scales for measuring patients' perceptions for coercion during mental hospital admission

Legal and extra-legal coercion are pervasive in mental hospital admission and there are sharp disputes about its appropriate role. This article presents two scales for measuring psychiatric patients' perceptions of coercion during hospital admission and reports data on these scales' internal consistency. We measure patients' perceptions of coercion by asking questions, in either an interview or questionnaire format, about their experience of lack of control, choice, influence, and freedom in hospital admission. Patients' responses to questions about their perceptions of coercion were highly internally consistent. The internal consistency of the scale was robust with respect to variation in site, instrument format, patient population, and interview procedure. Correspondence analysis was used to construct two numerical scales of perceived coercion.