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Depression does not affect time perception and time-to-contact estimation.

Oberfeld D, Thönes S, Palayoor BJ, Hecht H - Front Psychol (2014)

Bottom Line: However, experimental demonstrations of altered time perception in depressed patients are not conclusive.We added a timed action task (time-to-contact estimation, TTC) and compared this indirect time perception task to the more direct classical methods of verbal time estimation, time production, and time reproduction.We conclude that the notion that depression has a sizeable effect on time perception cannot be maintained.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Section Experimental Psychology, Johannes Gutenberg-Universität Mainz Mainz, Germany.

ABSTRACT
Depressed patients frequently report a subjective slowing of the passage of time. However, experimental demonstrations of altered time perception in depressed patients are not conclusive. We added a timed action task (time-to-contact estimation, TTC) and compared this indirect time perception task to the more direct classical methods of verbal time estimation, time production, and time reproduction. In the TTC estimation task, the deviations of the estimates from the veridical values (relative errors) revealed no differences between depressed patients (N= 22) and healthy controls (N= 22). Neither did the relative errors of the TTC estimates differ between groups. There was a weak trend toward higher variability of the estimates in depressed patients but only at the shortest TTC and at the fastest velocities. Time experience (subjective flow of time) as well as time perception in terms of interval timing (verbal estimation, time production, time reproduction) performed on the same subjects likewise failed to produce effects of depression. We conclude that the notion that depression has a sizeable effect on time perception cannot be maintained.

No MeSH data available.


Related in: MedlinePlus

Mean relative error as a function of time interval and task. Squares: verbal estimation. Circles: production. Triangles: reproduction. Error bars show 95% confidence intervals.
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Figure 1: Mean relative error as a function of time interval and task. Squares: verbal estimation. Circles: production. Triangles: reproduction. Error bars show 95% confidence intervals.

Mentions: First, we compared the three classical methods. As visible from Figure 1, the mean estimates were higher than the veridical values at the 0.5 s time interval. For longer time intervals the relative error was zero or the estimates were slightly lower than the veridical values. We conducted a repeated-measures analysis of variance (rmANOVA) on the relative error, using a univariate approach with Huynh-Feldt correction for the degrees of freedom (Huynh and Feldt, 1976). The correction factor is reported and partial η2 is used as a measure of effect size. The within-subjects factors were task (verbal estimate, time production, time reproduction) and time interval (0.5, 2, 60 s), and the between-subjects factor was group (depressive patients and healthy controls).


Depression does not affect time perception and time-to-contact estimation.

Oberfeld D, Thönes S, Palayoor BJ, Hecht H - Front Psychol (2014)

Mean relative error as a function of time interval and task. Squares: verbal estimation. Circles: production. Triangles: reproduction. Error bars show 95% confidence intervals.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4109439&req=5

Figure 1: Mean relative error as a function of time interval and task. Squares: verbal estimation. Circles: production. Triangles: reproduction. Error bars show 95% confidence intervals.
Mentions: First, we compared the three classical methods. As visible from Figure 1, the mean estimates were higher than the veridical values at the 0.5 s time interval. For longer time intervals the relative error was zero or the estimates were slightly lower than the veridical values. We conducted a repeated-measures analysis of variance (rmANOVA) on the relative error, using a univariate approach with Huynh-Feldt correction for the degrees of freedom (Huynh and Feldt, 1976). The correction factor is reported and partial η2 is used as a measure of effect size. The within-subjects factors were task (verbal estimate, time production, time reproduction) and time interval (0.5, 2, 60 s), and the between-subjects factor was group (depressive patients and healthy controls).

Bottom Line: However, experimental demonstrations of altered time perception in depressed patients are not conclusive.We added a timed action task (time-to-contact estimation, TTC) and compared this indirect time perception task to the more direct classical methods of verbal time estimation, time production, and time reproduction.We conclude that the notion that depression has a sizeable effect on time perception cannot be maintained.

View Article: PubMed Central - PubMed

Affiliation: Department of Psychology, Section Experimental Psychology, Johannes Gutenberg-Universität Mainz Mainz, Germany.

ABSTRACT
Depressed patients frequently report a subjective slowing of the passage of time. However, experimental demonstrations of altered time perception in depressed patients are not conclusive. We added a timed action task (time-to-contact estimation, TTC) and compared this indirect time perception task to the more direct classical methods of verbal time estimation, time production, and time reproduction. In the TTC estimation task, the deviations of the estimates from the veridical values (relative errors) revealed no differences between depressed patients (N= 22) and healthy controls (N= 22). Neither did the relative errors of the TTC estimates differ between groups. There was a weak trend toward higher variability of the estimates in depressed patients but only at the shortest TTC and at the fastest velocities. Time experience (subjective flow of time) as well as time perception in terms of interval timing (verbal estimation, time production, time reproduction) performed on the same subjects likewise failed to produce effects of depression. We conclude that the notion that depression has a sizeable effect on time perception cannot be maintained.

No MeSH data available.


Related in: MedlinePlus