Complex Stimuli in Nonreinforced Simple Discrimination Tasks: Emergent Simple and Conditional Discriminations

1995 ◽  
Vol 45 (3) ◽  
pp. 477-494 ◽  
Author(s):  
Jacqueline J. Schenk
Keyword(s):  
Simple Discrimination ◽  
Conditional Discriminations ◽  
Complex Stimuli

scholarly journals Simple discrimination training and conditional discrimination response

2015 ◽  
Vol 32 (1) ◽  
pp. 250
Author(s):  
Vicente Pérez ◽  
Eduardo Polín
Keyword(s):  
Discrimination Training ◽  
Conditional Stimulus ◽  
Conditional Discrimination ◽  
Psychology Students ◽  
Matching To Sample ◽  
Simple Discrimination ◽  
Conditional Discriminations ◽  
Control Variables ◽  
Verbal Skills ◽  
Acquisition Speed

<span lang="EN-US">The conditional discrimination is a procedure the use of which is widely extended in the EAB, especially those known as “Matching to Sample”. Although it has been used with a wide variety of species, the behavior of humans with verbal skills in these kinds of tasks may involve other control variables which are different from the scheduled contingencies of four terms. The aim of this work was to verify if conditional discriminations could be acquired, although reinforcement contingencies did not involve the sample. 109 psychology students, who were divided into three conditions, participated in the study. All of them were exposed to two blocks of training (A and B), with one sample and three comparisons, however, the sample did not really function as a conditional stimulus in 75% of the trials in block B. Simultaneity between sample and comparisons, as well as the requirement of a sample observation response, were manipulated resulting in three different conditions. The results showed no differences between acquisition speed in block A and block B in any condition, which suggests that the behavior of the participants was more controlled by the stimuli configuration than by the reinforcement contingencies.</span>

Functional Magnetic Resonance Imaging Measures of Blood Flow Patterns in the Human Auditory Cortex in Response to Sound

1998 ◽  
Vol 41 (3) ◽  
pp. 538-548 ◽  
Author(s):  
Sean C. Huckins ◽  
Christopher W. Turner ◽  
Karen A. Doherty ◽  
Michael M. Fonte ◽  
Nikolaus M. Szeverenyi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Speech Stimuli ◽  
Complex Stimuli ◽  
Scanning Session ◽  
Auditory Research

Functional Magnetic Resonance Imaging (fMRI) holds exciting potential as a research and clinical tool for exploring the human auditory system. This noninvasive technique allows the measurement of discrete changes in cerebral cortical blood flow in response to sensory stimuli, allowing determination of precise neuroanatomical locations of the underlying brain parenchymal activity. Application of fMRI in auditory research, however, has been limited. One problem is that fMRI utilizing echo-planar imaging technology (EPI) generates intense noise that could potentially affect the results of auditory experiments. Also, issues relating to the reliability of fMRI for listeners with normal hearing need to be resolved before this technique can be used to study listeners with hearing loss. This preliminary study examines the feasibility of using fMRI in auditory research by performing a simple set of experiments to test the reliability of scanning parameters that use a high resolution and high signal-to-noise ratio unlike that presently reported in the literature. We used consonant-vowel (CV) speech stimuli to investigate whether or not we could observe reproducible and consistent changes in cortical blood flow in listeners during a single scanning session, across more than one scanning session, and in more than one listener. In addition, we wanted to determine if there were differences between CV speech and nonspeech complex stimuli across listeners. Our study shows reproducibility within and across listeners for CV speech stimuli. Results were reproducible for CV speech stimuli within fMRI scanning sessions for 5 out of 9 listeners and were reproducible for 6 out of 8 listeners across fMRI scanning sessions. Results of nonspeech complex stimuli across listeners showed activity in 4 out of 9 individuals tested.

scholarly journals Cognitive Biases in Criminal Case Evaluation: A Review of the Research

2021 ◽  
Author(s):  
Vanessa Meterko ◽  
Glinda Cooper
Keyword(s):  
Cognitive Biases ◽  
Social Science Research ◽  
Science Research ◽  
Human Cognition ◽  
Criminal Case ◽  
Supporting Evidence ◽  
Case Evaluation ◽  
Complex Stimuli ◽  
The Usa ◽  
Specific Factors

AbstractPsychological heuristics are an adaptive part of human cognition, helping us operate efficiently in a world full of complex stimuli. However, these mental shortcuts also have the potential to undermine the search for truth in a criminal investigation. We reviewed 30 social science research papers on cognitive biases in criminal case evaluations (i.e., integrating and drawing conclusions based on the totality of the evidence in a criminal case), 18 of which were based on police participants or an examination of police documents. Only two of these police participant studies were done in the USA, with the remainder conducted in various European countries. The studies provide supporting evidence that lay people and law enforcement professionals alike are vulnerable to confirmation bias, and there are other environmental, individual, and case-specific factors that may exacerbate this risk. Six studies described or evaluated the efficacy of intervention strategies, with varying evidence of success. Further research, particularly in the USA, is needed to evaluate different approaches to protect criminal investigations from cognitive biases.

A note on select- and reject-controlling relations in the simple discrimination of capuchin monkeys (Cebus apella)

2005 ◽  
Vol 69 (3) ◽  
pp. 295-302 ◽  
Author(s):  
Paulo R.K. Goulart ◽  
Mariana B. Mendonça ◽  
Romariz S. Barros ◽  
Olavo F. Galvão ◽  
William J. McIlvane
Keyword(s):  
Cebus Apella ◽  
Capuchin Monkeys ◽  
Simple Discrimination
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