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Tag: cognitive psychology

Best Python libraries for Psychology researchers

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Python is gaining popularity in many fields of science. This means that there also are many applications and libraries specifically for use in Psychological research.

For instance, there are Python packages for collecting data, doing basic statistics and analysing brain imaging data. In this post, I have collected some useful Python packages for researchers within the field of Psychology and Neuroscience. I have used and tested some of them but others I have yet to try.

What is the Cross-modal oddball paradigm?

My current research focus on how attention can be captured by deviating stimuli. I will briefly describe the paradigm I have used – the cross-modal oddball task. Before I go into the cross-modal oddball task I will describe the auditory oddball task. In the oddball paradigm the subjects are exposed to a repetitive stream of distracting sounds. Furthermore, they can be either passive (i.e., watching a film) or engaged in a task (i.e., making judgments of durations of the tones). Typically subjects are exposed to two types of  distractors; one standard, presented frequently (i.e., 80 % of trials), and an oddball (‘Novel’ or ‘Deviant’) presented on infrequent trials (i.e., 20 % of the trials).

Cross-modal oddball sound sequence
Example of an oddball sequence. Black tones represent standard sounds and red represents deviant or novel sounds.

There is a plethora of research using the oddball paradigm in examining electrophysiological responses (i.e., ERPs) to deviating sounds (for reviews see; Bendixen, SanMiguel, & Schröger, 2012; Friedman, Cycowicz, & Gaeta, 2001). However, when engaged in a primary task there is also a behavioral cost – the response time to target tone is slowed by the presentation of a deviant (e.g., Berti, 2008).