IJIS  Vol.2 No.4 , October 2012
Accurately Measuring Inspection Time with Computers
ABSTRACT
Accurately measuring inspection time (IT) with computers requires several considerations. They are: 1) Screen redraw period; 2) Synchronous and timely image presentation; 3) Stimulus duration timing; 4) Image scale invariance; 5) Stan dardized presentation format (of which image scale invariance is a part). The first consideration dictates a minimum duration available for measuring IT. The second and third are necessary for accurate stimulus duration. The fourth is necessary to provide scale invariant images, that is, images with the same visual angle at a given viewing distance on any computer. And the fifth ensures that participants everywhere respond to the same task. Our computer program em bodies these elements and we make it freely available to any interested party. Data to establish validity and reliability are presented, and normative data on 2518 participants aged 6 to 92 years are available.

Cite this paper
A. Preiss and N. Burns, "Accurately Measuring Inspection Time with Computers," International Journal of Intelligence Science, Vol. 2 No. 4, 2012, pp. 96-102. doi: 10.4236/ijis.2012.24013.
References
[1]   D. Vickers, “Evidence for an Accumulator Model of Psychophysical Discrimination,” Ergonomics, Vol. 13, No. 1, 1970, pp. 37-58. doi:10.1080/00140137008931117

[2]   D. Vickers, “Decision Processes in Visual Perception,” Academic Press, London, 1979.

[3]   D. Vickers, T. Nettelbeck and R. J. Willson,“Perceptual Indices of Performance: The Measurement of ‘Inspection Time’ and ‘Noise’ in the Visual System,” Perception, Vol. 1, No. 3, 1970, pp. 263-295. doi:10.1068/p010263

[4]   D. Vickers and P. L. Smith, “The Rationale for the Inspection Time Index,” Personality and Individual Differences, Vol. 7, No. 5, 1986, pp. 609-623. doi:10.1016/0191-8869(86)90030-9

[5]   J. L. Grudnik and J. H. Kranzler, “Meta-Analysis of the Relationship between Intelligence and Inspection Time,” Intelligence, Vol. 29, No. 6, 2001, pp. 523-535. doi:10.1016/S0160-2896(01)00078-2

[6]   T. Gregory, T. Nettelbeck, S. Howard and C. Wilson, “Inspection Time: A Biomarker for Cognitive Decline,” Intelligence, Vol. 36, No. 6, 2008, pp. 664-671. doi:10.1016/j.intell.2008.03.005

[7]   T. Gregory, A. Callaghan, T. Nettelbeck and C. Wilson, “Inspection Time Predicts Individual Differences in Everyday Functioning among Elderly Adults: Testing Discriminant Validity,” Australasian Journal on Ageing, Vol. 28, No. 2, 2009, pp. 87-92. doi:10.1111/j.1741-6612.2009.00366.x

[8]   I. J. Deary and C. Stough, “Intelligence and Inspection Time: Achievements, Prospects and Problems,” American Psychologist, Vol. 51, No. 6, 1996, pp. 599-608. doi:10.1037/0003-066X.51.6.599

[9]   S. Xie, Y. Yang, Z. Yang and J. He, “Millisecond-Accurate Synchronization of Visual Stimulus Displays for Cognitive Research,” Behavior Research Methods, Vol. 37, No. 2, 2005, pp. 373-378. doi:10.3758/BF03192706

[10]   G. B. Wetherill and H. Levitt, “Sequential Estimation of Points on a Psychometric Function,” British Journal of Mathematical and Statistical Psychology, Vol. 18, No. 1, 1965, pp. 1-10. doi:10.1111/j.2044-8317.1965.tb00689.x

[11]   M. White, “Inspection Time Rationale Fails to Demonstrate That Inspection Time Is a Measure of the Speed of Post-Sensory Processing,” Personality and Individual Differences, Vol. 15, No. 2, 1993, pp. 185-198. doi:10.1016/0191-8869(93)90025-X

[12]   M. White, “Interpreting Inspection Time as a Measure of the Speed of Sensory Processing,” Personality and Individual Differences, Vol. 20, No. 3, 1996, pp. 351-363. doi:10.1016/0191-8869(95)00171-9

[13]   N. R. Burns, T. Nettelbeck and M. White, “Testing the Interpretation of Inspection Time as a Measure of Speed of Sensory Processing,” Personality and Individual Differences, Vol. 24, No. 1, 1998, pp. 25-39. doi:10.1016/S0191-8869(97)00142-6

[14]   A. R. Jensen, “Clocking the Mind: Mental Chronometry and Individual Differences,” Elsevier Ltd., Oxford, 2006.

[15]   G. Evans and T. Nettelbeck, “Inspection Time: A Flash Mask to Reduce Apparent Movement Effects,” Personality and Individual Differences, Vol. 15, No. 1, 1993, pp. 91-94. doi:10.1016/0191-8869(93)90045-5

 
 
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