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Simultaneous vs sequential photospread techniques: a study of administrator bias

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Creator: 

Silvaggio, Andrew D

Responsibility: 
Andrew D Silvaggio
Start Date: 
2003
End Date: 
2003
Date Range: 
2003 April 02
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752.86 KB of textual records (PDF)

Notes: 

Audience: Undergraduate. -- Dissertation: Thesis (B. A.). -- Algoma University, 2003. -- Submitted in partial fulfillment of course requirements for PSYC 4105. -- Includes figures. -- Contents: Thesis.

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Publication: 
Sault Ste. Marie, Ont.:
Standard No: 
OSTMA-PSYC-Silvaggio-Andrew-D-20030402
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rec_shelfloc: 
2013-064-001
Repository: 
Algoma University Archive
Container Number: 
001
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Historical Context: 

Sequential Photospread techniques were compared with simultaneous Photospread techniques to determine if one technique was more effective than the other. The effect of administrator knowledge was also measured. Post-secondary students participated (N=117), some as witnesses viewed a 20 second mock robbery video and then they participated in a Photospread identification procedure. Five students per class were randomly assigned to be administrators; these students did not watch the video. Administrators were randomly assigned to either a sequential blind, sequential informed, simultaneous blind or simultaneous informed condition. Sequential lineup presentation produced significantly fewer false positives (54.5%) then simultaneous lineup presentation (79.1%), Z=2.43,p=0.008. There was no statistically significant difference in the number of suspect false identifications in the blind condition (27.9%) compared with the informed condition (25%),Z=0.31,p=0.621.

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