title: Contribution of coherent motion to the perception of biological motion among persons with Schizophrenia.
abstract: People with schizophrenia (SCZ) are impaired in several domains of visual processing, including the discrimination and detection of biological motion. However, the mechanisms underlying SCZ-related biological motion processing deficits are unknown. Moreover, whether these impairments are specific to biological motion or represent a more widespread visual motion processing deficit is unclear. In the current study, three experiments were conducted to investigate the contribution of global coherent motion processing to biological motion perception among patients with SCZ. In Experiments 1 and 2, participants with SCZ (n = 33) and healthy controls (n = 33) were asked to discriminate the direction of motion from upright and inverted point-light walkers in the presence and absence of a noise mask. Additionally, participants discriminated the direction of non-biological global coherent motion. In Experiment 3, participants discriminated the direction of motion from upright scrambled walkers (which contained only local motion information) and upright random position walkers (which contained only global form information). Consistent with previous research, results from Experiment 1 and 2 showed that people with SCZ exhibited deficits in the direction discrimination of point-light walkers; however, this impairment was accounted for by decreased performance in the coherent motion control task. Furthermore, results from Experiment 3 demonstrated similar performance in the discrimination of scrambled and random position point-light walkers.
authors: Department of Psychology, Neuroscience and Behaviour, McMaster University Hamilton, ON, Canada.
authors: Justine M Y
authors: JM
authors: Spencer
authors: Allison B
authors: AB
authors: Sekuler
authors: Patrick J
authors: PJ
authors: Bennett
authors: Bruce K
authors: BK
authors: Christensen
keywords: biological motion; global mechanisms; local mechanisms; motion; paranoid; perception; schizophrenia
references: J Exp Psychol Hum Percept Perform. 2005 Feb;31(1):210-220
references: 15709874
references: Arch Gen Psychiatry. 2002 Nov;59(11):1011-20
references: 12418934
references: Schizophr Res. 2005 Sep 15;77(2-3):299-307
references: 15922565
references: Philos Trans R Soc Lond B Biol Sci. 2003 Mar 29;358(1431):435-45
references: 12689371
references: Percept Psychophys. 1978 Feb;23(2):145-52
references: 643509
references: PLoS One. 2011;6(5):e19971
references: 21625492
references: Cogn Affect Behav Neurosci. 2008 Sep;8(3):293-303
references: 18814466
references: J Neurosci. 1996 Jun 1;16(11):3737-44
references: 8642416
references: Schizophr Res. 2001 Mar 30;48(2-3):235-53
references: 11295377
references: J Clin Psychiatry. 1998;59 Suppl 20:22-33;quiz 34-57
references: 9881538
references: J Cogn Neurosci. 2005 Mar;17(3):377-91
references: 15813999
references: Proc Biol Sci. 1992 Aug 22;249(1325):149-55
references: 1360675
references: Perception. 2009;38(4):522-32
references: 19522321
references: Biol Psychiatry. 1983 Nov;18(11):1311-20
references: 6652164
references: Arch Gen Psychiatry. 1995 Oct;52(10):805-18; discussion 819-20
references: 7575100
references: Vision Res. 2010 Jan;50(2):211-9
references: 19941881
references: Proc Natl Acad Sci U S A. 2002 Apr 16;99(8):5661-3
references: 11960019
references: Nat Rev Neurosci. 2003 Mar;4(3):179-92
references: 12612631
references: J Abnorm Psychol. 2001 Feb;110(1):40-8
references: 11261398
references: Schizophr Bull. 1987;13(2):261-76
references: 3616518
references: Neuron. 2002 Sep 12;35(6):1167-75
references: 12354405
references: Schizophr Res. 2006 Apr;83(2-3):257-67
references: 16497483
references: Schizophr Bull. 2008 Jul;34(4):645-55
references: 18468987
references: Spat Vis. 1997;10(4):437-42
references: 9176953
references: Annu Rev Neurosci. 1987;10:363-401
references: 3105414
references: Perception. 2004;33(6):717-46
references: 15330366
references: Psychiatry Res. 2002 Sep 15;112(1):41-50
references: 12379449
references: J Exp Psychol Hum Percept Perform. 2005 Dec;31(6):1247-1265
references: 16366787
references: Psychol Med. 2008 May;38(5):747-54
references: 17988413
references: Schizophr Res. 2007 Sep;95(1-3):61-4
references: 17628436
references: Psychiatry Res. 2006 Jun 30;143(1):51-61
references: 16725209
references: Proc Natl Acad Sci U S A. 1999 Apr 13;96(8):4724-9
references: 10200329
references: J Abnorm Psychol. 2008 Nov;117(4):799-811
references: 19025227
references: Schizophr Res. 2007 Aug;94(1-3):245-52
references: 17583482
references: Psychol Med. 1997 Jan;27(1):143-52
references: 9122294
references: Schizophr Res. 2003 Jun 1;61(2-3):215-27
references: 12729873
references: Am J Psychiatry. 2003 Oct;160(10):1768-74
references: 14514489
references: Arch Gen Psychiatry. 2000 Aug;57(8):761-8
references: 10920464
references: Schizophr Res. 2002 Jan 1;53(1-2):67-74
references: 11728839
references: Am J Psychiatry. 2001 Nov;158(11):1818-26
references: 11691687
references: Curr Biol. 2006 Apr 18;16(8):821-4
references: 16631591
references: Cogn Neuropsychol. 1998 Sep 1;15(6-8):535-52
references: 22448837
references: Spat Vis. 1997;10(4):433-6
references: 9176952
references: Vision Res. 2001;41(10-11):1475-82
references: 11322987
references: J Exp Child Psychol. 1984 Apr;37(2):213-30
references: 6726112