Time perception and depressive realism: judgment type, psychophysical functions and bias.

The effect of mild depression on time estimation and production was investigated. Participants made both magnitude estimation and magnitude production judgments for five time intervals (specified in seconds) from 3 sec to 65 sec. The parameters of the best fitting psychophysical function (power law...

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Autores principales:	Diana E Kornbrot, Rachel M Msetfi, Melvyn J Grimwood
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/da76834eee844e67a513c8d30d2f7119
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spelling	oai:doaj.org-article:da76834eee844e67a513c8d30d2f71192021-11-18T08:58:38ZTime perception and depressive realism: judgment type, psychophysical functions and bias.1932-620310.1371/journal.pone.0071585https://doaj.org/article/da76834eee844e67a513c8d30d2f71192013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23990960/?tool=EBIhttps://doaj.org/toc/1932-6203The effect of mild depression on time estimation and production was investigated. Participants made both magnitude estimation and magnitude production judgments for five time intervals (specified in seconds) from 3 sec to 65 sec. The parameters of the best fitting psychophysical function (power law exponent, intercept, and threshold) were determined individually for each participant in every condition. There were no significant effects of mood (high BDI, low BDI) or judgment (estimation, production) on the mean exponent, n = .98, 95% confidence interval (.96-1.04) or on the threshold. However, the intercept showed a 'depressive realism' effect, where high BDI participants had a smaller deviation from accuracy and a smaller difference between estimation and judgment than low BDI participants. Accuracy bias was assessed using three measures of accuracy: difference, defined as psychological time minus physical time, ratio, defined as psychological time divided by physical time, and a new logarithmic accuracy measure defined as ln (ratio). The ln (ratio) measure was shown to have approximately normal residuals when subjected to a mixed ANOVA with mood as a between groups explanatory factor and judgment and time category as repeated measures explanatory factors. The residuals of the other two accuracy measures flagrantly violated normality. The mixed ANOVAs of accuracy also showed a strong depressive realism effect, just like the intercepts of the psychophysical functions. There was also a strong negative correlation between estimation and production judgments. Taken together these findings support a clock model of time estimation, combined with additional cognitive mechanisms to account for the depressive realism effect. The findings also suggest strong methodological recommendations.Diana E KornbrotRachel M MsetfiMelvyn J GrimwoodPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 8, p e71585 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Diana E Kornbrot Rachel M Msetfi Melvyn J Grimwood Time perception and depressive realism: judgment type, psychophysical functions and bias.
description	The effect of mild depression on time estimation and production was investigated. Participants made both magnitude estimation and magnitude production judgments for five time intervals (specified in seconds) from 3 sec to 65 sec. The parameters of the best fitting psychophysical function (power law exponent, intercept, and threshold) were determined individually for each participant in every condition. There were no significant effects of mood (high BDI, low BDI) or judgment (estimation, production) on the mean exponent, n = .98, 95% confidence interval (.96-1.04) or on the threshold. However, the intercept showed a 'depressive realism' effect, where high BDI participants had a smaller deviation from accuracy and a smaller difference between estimation and judgment than low BDI participants. Accuracy bias was assessed using three measures of accuracy: difference, defined as psychological time minus physical time, ratio, defined as psychological time divided by physical time, and a new logarithmic accuracy measure defined as ln (ratio). The ln (ratio) measure was shown to have approximately normal residuals when subjected to a mixed ANOVA with mood as a between groups explanatory factor and judgment and time category as repeated measures explanatory factors. The residuals of the other two accuracy measures flagrantly violated normality. The mixed ANOVAs of accuracy also showed a strong depressive realism effect, just like the intercepts of the psychophysical functions. There was also a strong negative correlation between estimation and production judgments. Taken together these findings support a clock model of time estimation, combined with additional cognitive mechanisms to account for the depressive realism effect. The findings also suggest strong methodological recommendations.
format	article
author	Diana E Kornbrot Rachel M Msetfi Melvyn J Grimwood
author_facet	Diana E Kornbrot Rachel M Msetfi Melvyn J Grimwood
author_sort	Diana E Kornbrot
title	Time perception and depressive realism: judgment type, psychophysical functions and bias.
title_short	Time perception and depressive realism: judgment type, psychophysical functions and bias.
title_full	Time perception and depressive realism: judgment type, psychophysical functions and bias.
title_fullStr	Time perception and depressive realism: judgment type, psychophysical functions and bias.
title_full_unstemmed	Time perception and depressive realism: judgment type, psychophysical functions and bias.
title_sort	time perception and depressive realism: judgment type, psychophysical functions and bias.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/da76834eee844e67a513c8d30d2f7119
work_keys_str_mv	AT dianaekornbrot timeperceptionanddepressiverealismjudgmenttypepsychophysicalfunctionsandbias AT rachelmmsetfi timeperceptionanddepressiverealismjudgmenttypepsychophysicalfunctionsandbias AT melvynjgrimwood timeperceptionanddepressiverealismjudgmenttypepsychophysicalfunctionsandbias
_version_	1718421112838160384

Time perception and depressive realism: judgment type, psychophysical functions and bias.

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