Developing a Psychophysical Measure to Assess Duration Discrimination in the Millisecond
Range

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Abstract

Duration discrimination in the range of milliseconds is essential for various aspects of behavior and individual differences. The present paper addresses important methodological issues, such as type of stimuli, type of task, method for threshold estimation, and temporal sensitivity of the psychophysical procedure, that should be borne in mind when developing a sensitive and reliable duration discrimination task. Furthermore, it introduces a psychophysical approach for the assessment of individual differences in duration discrimination of extremely brief intervals in the subsecond range. Monte Carlo simulations provide clear evidence that this task is sensitive enough to correctly detect a true difference between temporal stimuli as small as 2 ms with a high probability. Further, the distributional properties of individual performance scores obtained from 534 participants by means of the introduced duration discrimination task are presented.

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Mitochondrial Machineries for Protein Import and Assembly.

Nils Wiedemann, Nikolaus Pfanner (2017)

Mitochondria are essential organelles with numerous functions in cellular metabolism and homeostasis. Most of the >1,000 different mitochondrial proteins are synthesized as precursors in the cytosol and are imported into mitochondria by five transport pathways. The protein import machineries of the mitochondrial membranes and aqueous compartments reveal a remarkable variability of mechanisms for protein recognition, translocation, and sorting. The protein translocases do not operate as separate entities but are connected to each other and to machineries with functions in energetics, membrane organization, and quality control. Here, we discuss the versatility and dynamic organization of the mitochondrial protein import machineries. Elucidating the molecular mechanisms of mitochondrial protein translocation is crucial for understanding the integration of protein translocases into a large network that controls organelle biogenesis, function, and dynamics.

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Distinct systems for automatic and cognitively controlled time measurement: evidence from neuroimaging.

Penelope Lewis, R. Christopher Miall (2003)

A recent review of neuroimaging data on time measurement argued that the brain activity seen in association with timing is not influenced by specific characteristics of the task performed. In contrast, we argue that careful analysis of this literature provides evidence for separate neural timing systems associated with opposing task characteristics. The 'automatic' system draws mainly upon motor circuits and the 'cognitively controlled' system depends upon prefrontal and parietal regions.

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Adaptive procedures in psychophysical research.

R Leek (2001)

As research on sensation and perception has grown more sophisticated during the last century, new adaptive methodologies have been developed to increase efficiency and reliability of measurement. An experimental procedure is said to be adaptive if the physical characteristics of the stimuli on each trial are determined by the stimuli and responses that occurred in the previous trial or sequence of trials. In this paper, the general development of adaptive procedures is described, and three commonly used methods are reviewed. Typically, a threshold value is measured using these methods, and, in some cases, other characteristics of the psychometric function underlying perceptual performance, such as slope, may be developed. Results of simulations and experiments with human subjects are reviewed to evaluate the utility of these adaptive procedures and the special circumstances under which one might be superior to another.

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Author and article information

Journal

Journal ID (publisher-id): jpa

Title: European Journal of Psychological Assessment

Publisher: Hogrefe Publishing

ISSN (Print): 1015-5759

ISSN (Electronic): 2151-2426

Publication date (Print): February 2012

Publication date (Electronic): 2012

Volume: 28

Issue: 3

Pages: 172-180

Affiliations

[ ¹ ] University of Bern, Bern, Switzerland

Author notes

Thomas Rammsayer, Department of Psychology, University of Bern, Muesmattstrasse 45, CH-3000 Bern 9, Switzerland, +41 31 631-3649, +41 31 631-8212, thomas.rammsayer@ 123456psy.unibe.ch

Article

Apa ID: jpa_28_3_172

DOI: 10.1027/1015-5759/a000124

SO-VID: 22faba2b-6037-42e9-8179-f8005bbf387c

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