Motion aftereffects with rotating ellipses

Summary The perceptual outcome and the motion-aftereffect duration generated by the rotation on the frontal plane of an ellipse with a bar depend on whether the bar is placed along the major or the minor axis. When the bar is placed along the minor axis, a stereokinetic transformation occurs, and the pattern looks like a tilting ring with a perpendicular bar moving rigidly with it. Placing the bar along the major axis prevents the stereokinetic transformation: subjects report deformations and relative motion of the bar with respect to the ellipse. We found that motion aftereffects last longer when the bar is placed along the minor rather than along the major axis. A series of experiments was carried out to investigate whether differences in aftereffect duration are related to the stereokinetic transformation. Results seem to suggest that they are not.The authors' names are in alphabetical order.     

Book reviews and notes

GENERAL.

READINGS IN THE QUR'AN. Selected and translated by KENNETH CRAGG. London: Collins Liturgical Publications, 1990. 389pp. Pb. £8.95. ISBN 0–00–599087–4.

DER KORAN UND DIE JUDEN: DIE GESCHICHTE EINER TRAGODIE. By Johan Bouman. Darmstadt: Wissenschaftliche Buch‐gesellschaft, 1990. 130pp. Pb. n.p. ISBN 3–534–80123–7.

ISMAIL HAKKI BURSEVPS TRANSLATION OF AND COMMENTARY ON FUSUS AL‐HKAM. VOLS. 3 and 4. By Muhyiddin Ibn Arabi. Translated by Bulent Rauf with the help of R. Brass and H. Tollemache. Oxford: Muhyiddin ibn ^cArabi Society, 1989, 1991. 254pp, 353pp. Hb. £40.00, £50.00. ISBN 0–9509527–2–9; 0–9509527–4–5.

SCIENCE AND MUSLIM SOCIETIES. By Nasim Butt. London: Grey Seal Books, 1991. 135pp. Pb. £5.95. ISBN 1–85640–023–9.

THE MUSLIMS OF AMERICA. Edited by Yvonne Yazbeck Haddad. Oxford: Oxford University Press, 1991. 249pp. Hb. £35.00. ISBN 0–19–506728–2.

TURNING POINTS IN RELIGIOUS STUDIES. By URSULA KING. Edinburgh: T & T Clark Ltd, 1990. 329pp. Hb. £19.95. ISBN 0–567–09564–9.

THE SEPARATED ONES: JESUS, THE PHARISEES AND ISLAM. By Ruqaiyyah Waris Maqsood. London: SCM Press, 1991. 194pp. Pb. £9.95. ISBN 0–334–02498–6.

WHO NEEDS AN ISLAMIC STATE! By Abdelwahab El‐Affendi. London: Grey Seal Books, 1991.115pp. Pb. £5.95. ISBN 1–85640–022–0.

‘MULTI‐FAITH WORSHIP'? QUESTIONS AND SUGGESTIONS FROM THE INTER‐FAITH CONSULTATIVE GROUP. By The. General Synod Board of Mission. London: Church House Publishing, 1992. 66pp. Pb. £3.50. ISBN 0–7151–5530‐X.

WAS SAGT DER KORAN ZUM HEILIGEN KRIEG? By Adel TheodorKhoury. Giitersloh: Gutersloher Verlaghaus Gerd Mohn, 1991. 95pp. Pb. DM12.80. ISBN 3–579–00787–0.

REGIONAL.

Africa.

RELIGION AND CUSTOM IN A MUSLIM SOCIETY: THE BERTI OF SUDAN. By Ladislav Holy. Cambridge Studies in Social and Cultural Anthropology. Cambridge: Cambridge University Press, 1991. 243pp. Hb. £30.00; $49.50. ISBN 0–521–39485–6.

POPULAR ISLAM IN TUNISIA. By Kees Schilder. Research Reports 1991/44. Leiden: African Studies Centre, 1991. 171pp. Pb. DFL.12.50. ISBN 90–70110–85–7.

A POEM CONCERNING THE DEATH OF THE PROPHET MUHAMMAD UTENDI WA KUTA WAFUNABII. Edited by J.W.T. Allen, Rland Allen, N.Q. King, Jan Knappert Et Al. African Studies, 26. New York/Ontario/Larnpeter: The Edwin Mellen Press, 1991. 161pp. Hb. n.p. ISBN 0–7734–9705–6.

SACRED VOID: SPATIAL IMAGES OF WORK AND RITUAL AMONG THE GIRIAMA OF KENYA. By David Parkin. Cambridge Studies in Social and Cultural Anthropology. Cambridge: Cambridge University Press, 1992. 259pp. Hb. £35.00. ISBN 0–521–40466–5.

PEOPLE AND EMPIRES IN AFRICAN HISTORY: ESSAYS IN MEMORY OF MICHAEL CROWDER. Edited By J.F. Ade Ajayi and J.D.Y. Peel. London and New York: Longman, 1992. 254pp. Hb. £36.00. ISBN 0–582–08997–2.

Asia.

MUSLIMS IN CENTRAL ASIA: EXPRESSIONS OF IDENTITY AND CHANGE. By Jo‐ANN GROSS. Durham: Duke University Press, 1992. 224pp. Pb. $18.95. ISBN 0–8223–1190–9.

Europe.

ISLAM IN DUTCH SOCIETY: CURRENT DEVELOPMENTS AND FUTURE PROSPECTS. Edited by W.A.R. Shadid and P.S. Van Koningsveld. Kampen. Kok Pharos Publishing House, 1992. 205pp. Pb. n.p.ISBN 90–242–3047–0.

VAN MAT TOT MINARET. By Nico Landman. Amsterdam: VU Uitgeverij, 1992. 387pp. Pb. n.p. ISBN 90–5383–086–3.

DE ISLAM IN WEST‐EUROPA, IN HET BIJZONDER IN NEDERLAND. By HuUG Van Ooijen, Rinus Penninx, Jan Rath and ThulSunier. Nijmegen: Reeks REcht & Samenleving, 1991. 76pp. Pb. n.p. ISBN 90–71478–20–3.

MUSLIMS IN WESTERN EUROPE. By Jorgen S. Nielsen. Islamic Surveys 20. Edinburgh: Edinburgh University Press, 1992. 186pp. Hb. £25.00. ISBN 0–7486–0309–0.

NATIONAL PROBLEMS IN THE BALKANS: HISTORY AND CONTEMPORARY DEVELOPMENTS. Edited by V. Mincheva. Sofia: Arges Publishing House for the Institute of Balkan Studies, 1992.247pp. Pb. LV20,00. No ISBN.

THE BALKANS: MINORITIES AND STATES IN CONFLICT. By Hugh Poulton. London: Minority Rights Publications, 1991. 244pp. Pb. £8.95. ISBN 1–873194–05–6.

THE SATANIC VERSES: BRADFORD RESPONDS. Edited by David G. Bowen. Bradford: D.G. Bowen and Bradford & Ilkley Community College, 1992. 82pp. Pb. .n.p. ISBN 0–947–851–25–9.

THE KINGDOM OF CYPRUS AND THE CRUSADES 1191–1374. By Peter W. Edbury. Cambridge: Cambridge University Press, 1991.241pp. Hb. £27.50, $44.50. ISBN 0–521–26876–1.

DIE MIGRANTEN AUS SUBAY: TURKEN IN DEUTSCHLAND: EINE ETHNOGRAPHIE. By Werner Schiffauer. Stuttgart: Klett‐Cotta, 1991. 388pp. Hb. n.p. ISBN 3–608–93170–8.

Middle East.

POLITICAL ISLAM: RELIGION AND POLITICS IN THE ARAB WORLD. By Nazih N. Ayubi. London and New York: Routledge, 1991. 291pp. Hb. £40.00. ISBN 0–415–05442–7.

THE ARAB CHRISTIAN: A HISTORY IN THE MIDDLE EAST. By Kenneth CRAGG. London: Mowbray, 1992. 336pp. Pb. £9.95. ISBN 0–264–67257–7.

ISLAMIC FUNDAMENTALISM AND THE GULF CRISIS. Edited by JAMES PISCATORI. Chicago: The University of Chicago Press, 1991. 267pp. Pb. £7.95; $11.50. ISBN 0–9629608–0–2.

RACE AND SLAVERY IN THE MIDDLE EAST. By BERNARD LEWIS. Oxford: Oxford University Press, 1990. 184pp. Hb. £22.50. ISBN 0–19–506283–3.

THE IRAQI REVOLUTION OF 1958: THE OLD SOCIAL CLASSES REVISITED. Edited by Robert A. Fernea and Wm. Roger Louis. London: I.B. Tauris, 1991. 232pp. Hb. £35.00. ISBN 1–85043–318–6.

CULTURE, HISTORY AND IDEOLOGY IN THE FORMATION OF BA'THIST IRAQ, 1968–69. By AMATZIABaram. New York: St Martin's Press, 1991. 196pp. Hb. £35.00. ISBN 0–312–04805‐X.

THE PALLESTINIAN UPRISING: A WAR BY OTHER MEANS. By F. Robert Hunter. London: I.B. Tauris, 1991.292pp. Hb. £17.95. ISBN 1–85043–325–9.

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THE LION OF EGYPT: SULTAN BAYBARSI AND THE NEAR EAST IN THE TfflRTEENTH CENTURY. By Peter THORAU. London: London and New York, 1987. 319pp. Pb. £13.50. ISBN 0–582–06823–1.

HISTORICAL DICTIONARY OF LIBYA. By RONALD BRUCE ST JOHN. African Historical Dictionaries, 33.2nd Edition. Metuchen, NJ & London: Scarecrow Press, 1991. 192pp. Hb. £18.75. ISBN 0–8108–2451–5.

ACCOMMODATING PROTEST: WORKING WOMEN, THE NEW VEBLING AND CHANGE IN CAIRO. By ARLENE ELOWE MACLEOD. New York: Columbia University Press, 1991. 206pp. Hb. $37.50. ISBN 0–231–07280–5.

FEZ: CITY OF ISLAM. By Titus Burckhardt. Cambridge: Islamic Texts Society, 1992. 175pp. Hb. £24.95; $39.95. ISBN 0–946621–17–9.

CHRISTIAN‐MUSLIM RELA TIONS.

ROBIN LAMBURN — FROM A MISSIONARY'S NOTEBOOK: THE YAO OF TUNDURU AND OTHER ESSAYS. Edited by NOEL Q. KING and Klaus Fiedler with Gavin White. Social Science Studies on International Problems, no. 164. Saarbriicken; Fort Lauderdale: Verlag Breitenbach, 1991. 240pp. Pb. n.p. ISBN 0584–603‐X.

MATERIAUX POUR SERVIR A L'ETUDE DE LA CONTROVERSE THEOLOGIQUEISLAMO‐CHRETIENNE DE LANGUE ARABE DU Vffle AUX Xlle SIECLE. By PAUL KHOURY. Religionswissenschaftliche Studien 11/2. Wurzburg: Echter Verlag and Altenberge: Oros Verlag, 1991. 633pp. Pb. $633.00; DM99.80. ISBN 3–429–01410–7 (Echter); 3–89375–039–8 (Oros).

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DIPLOMATARIUM II: DOCUMENTS 1–500: FOUNDATIONS OF CRUSADER VALENCIA: REVOLT AND RECOVERY 1257–1263. By ROBERT I. Burns. Princeton: New Jersey, 1991. 440pp. Hb. $69.50. ISBN 0–691–05435–5.

ANTI‐CHRISTIAN POLEMIC IN EARLY ISLAM: ABU ‘ISA AL‐WARRAQ'S ‘AGAINST THE TRINITY’. By David Thomas. University of Cambridge Oriental Publications 45. Cambridge: Cambridge University Press, 1992. 218pp. Hb. £40.00; $74.95. ISBN 0–521–41244–7.

INCULTURATION ET LIBERATION EN AFRIQUE AUJOURDHUI: MELANGES EN L'HONNEUR DU PROFESSEUR ABBE MULAGO GWA CKALA. Revue Africaine de Theologie, 27–28, April‐October 1990. 336pp. No ISBN number.

STRIVING TOGETHER: A WAY FORWARD IN CHRISTIAN‐MUSLIM RELATIONS. By Charles Kimball. Maryknoll: Orbis Books, 1991. 132pp. Pb. n.p. ISBN 0–88344–691‐X.

INTERWINED WORLDS: MEDIEVAL ISLAM AND BIBLE CRITICISM. By Hava Lazarus‐Yafeh. Princeton University Press, 1992. 178pp. Hb. £22.50; $29.95. ISBN 0–691–07398–8.     

Revisitation of the luminance conditions for the occurrence of the achromatic neon color spreading illusion

This paper develops the idea (Bressan, 1993) that neon spreading derives from the perceptual scissioning of ordinary assimilation color, a process identical to that occurring with nonillusory colors in phenomenal transparency. It is commonly held that the critical elements in achromatic neon spreading patterns must be of luminance intermediate between that of the embedding lines and of the background. The interpretation of neon spreading on the basis of color scissioning, however, predicts that neon spreading should also be observed for different luminance hierarchies, provided that these are compatible with transparency. This prediction found experimental support in the present work. The results suggest that (1) the widespread notion that chromatic and achromatic neon spreading must be mediated by separate mechanisms is unwarranted; (2) the widespread notion that color spreading in ordinary assimilation patterns and color spreading in neon patterns must be mediated by separate mechanisms is unwarranted; and (3) other than pointing to the way in which the overall organization of a scene affects the mode of color appearance, the neon spreading effect may not convey any extra theoretical relevance.     

In Vitro Fertilization: A Pastoral Taboo?

Journal of Religion and Health - Scholars have shown how the moral limitations and caveats that many religions pose against new assisted reproductive technologies have hindered women’s...     

Correction to: Autism,autistic traits and creativity: a systematic review and meta-analysis

Cognitive Processing - In the original publication of the article, the first and last names of the authors are interchanged and published incorrectly. The correct author names are given below:...     

Evaluating adult interaction during the Step It UP! game to increase physical activity in children

A recent intervention, the Step it UP! game (Galbraith & Normand, 2017), consists of an interdependent group contingency to increase student physical activity. In addition, previous research demonstrated that adult interaction may reinforce physical activity (Larson et al., 2014). We extended research on the Step it UP! game by comparing the effects of no game, Step it UP! game, and Step it UP! game plus adult interaction on the number of steps taken by participants in a third-grade classroom during recess. Overall, 19 of the 25 participants took more steps during the Step it UP! game plus adult interaction compared to the Step it UP! game and no-game recesses. Furthermore, 20 participants preferred the Step it UP! game plus adult interaction. Results suggest that adult interaction can enhance the effects of the Step it UP! game to increase physical activity.     

Representations and narratives during pregnancy

In this paper, we explore how maternal representations, and in particular their contents, are structured during pregnancy. Twenty-three primiparous women were recruited for participation in a longitudinal study about mothers' thoughts and feelings about their infants. A semistructured interview was conducted with each of the subjects in the third trimester of pregnancy. During the interview, subjects were also given five adjective lists based on the semantic differential model. Results from this sample indicate similarities in the content-free aspects of representations of self and baby, but differences in the content of these presentations. Implications of these results are discussed with regard to the construction of an internal representation of the child in the third trimester of pregnancy.     

Peculiar aspects of reading and writing performances in patients with olivopontocerebellar atrophy

Olivopontocerebellar atrophy (OPCA) is a still debated condition, of which motor disruption is the most common feature. A high incidence of associated mood disorders may exist, but there are few studies on concomitant cognitive impairment. Our aim was to assess whether there is reading and writing disruption in olivopontocerebellar atrophy (OPCA). 6 patients were administered different reading and writing tasks. Scores were then compared to those obtained by healthy volunteers. There was an evident impairment in reading and writing execution in our patients compared to those of the control group. On the contrary, no difference could be found in abstraction, problem-solving, and memory tasks. We discuss the results, debating the role of the cerebellum in the conscious process of cognition or in ocular movement control (necessary for reading and writing fluidity and effective execution) and in the dynamic activation of all the cerebral cortex mediated by the diffuse projection to the reticular system.