Search results for "Discrimination"

The goldfish--a colour-constant animal.

1996

A series of either thirteen or fifteen coloured test fields with hues from blue through grey to yellow were presented on a black background. Goldfish were trained on a bluish-grey test field by food reward. In the training situation, the setup with the coloured papers was illuminated with white light. In the test situation, the colour of the illumination was changed to blue or yellow. In both test illuminations the goldfish preferred the training field in the same way as under white illumination despite the fact that this test field stimulated the cone types very differently from the training situation. As test fields were present that excited the cones in exactly the same way as under whi…

Lesion of areas 17/18/19: effects on the cat's performance in a binary detection task

1988

The ability of two cats to discriminate between two geometrical outline patterns in the presence of superimposed Gaussian visual noise — i.e. in a binary detection task — was tested before and after bilateral removal of cortical areas 17, 18 and 19. The detection probability PD was measured as a function of the signal-to-noise ratio. After a lesion of areas 17, 18 and 19 both cats were unable to carry out the discrimination tasks. Their detection performance dropped to chance level, but after an extensive phase of retraining (3 months) they regained the ability to discriminate visual patterns. It was thus possible to obtain detection curves and to determine a measure of a performance which …

Recognition of familiarity on the basis of howls: a playback experiment in a captive group of wolves

2015

Playback experiments were conducted with a pack of captive Iberian wolves. We used a habituation–discrimination paradigm to test wolves’ ability to discriminate howls based on: (1) artificial manipulation of acoustic parameters of howls and (2) the identity of howling individuals. Manipulations in fundamental frequency and frequency modulation within the natural range of intra-individual howl variation did not elicit dishabituation, while manipulation of modulation pattern did produce dishabituation. With respect to identity, across trials wolves habituated to unfamiliar howls by a familiar wolf (i.e., no direct contact, but previous exposure to howls by this wolf), but not to unfamiliar ho…

Les comparaisons internationales en matière d'inégalités sociales en éducation

1999

actes du congrès international sur "L'histoire et l'avenir de l'éducation comparée en langue française"; International audience

The construction of inequalities between girls and boys of success in physical education at the baccalaureate between girls and boys

2004

This research investigates the effect of social and school processes on explanation of the achievement's differences between girls and boys in PE, particularly when they are assessed in team sports in secondary education. The performances of girls often are lower than those of boys. Traditionally, the differentiated performances may be attributed to physiological or sociological reasons. The object of this research, conducted about 1245 pupils and theirs PE teachers, was to focus on a possible differential treatment at school between girls and boys. Teacher's perceptions about sport as a male domain influence the process in which girls receive at school a poorest learning. The relative fail…

Does signal detection methodology allow to measure discrimination, but not pain?

1979

The neural basis of sublexical speech and corresponding nonspeech processing: a combined EEG-MEG study.

2014

Abstract We addressed the neural organization of speech versus nonspeech sound processing by investigating preattentive cortical auditory processing of changes in five features of a consonant–vowel syllable (consonant, vowel, sound duration, frequency, and intensity) and their acoustically matched nonspeech counterparts in a simultaneous EEG–MEG recording of mismatch negativity (MMN/MMNm). Overall, speech–sound processing was enhanced compared to nonspeech sound processing. This effect was strongest for changes which affect word meaning (consonant, vowel, and vowel duration) in the left and for the vowel identity change in the right hemisphere also. Furthermore, in the right hemisphere, spe…

Auditory discrimination profiles of speech sound changes in 6-year-old children as determined with the multi-feature MMN paradigm.

2009

Objective: A linguistic multi-feature mismatch negativity (MMN) paradigm with five types of changes (vowel, vowel-duration, consonant, frequency (F0), and intensity) in Finnish syllables was used to determine speech-sound discrimination in 17 normally-developing 6-year-old children. The MMNs for vowel and vowel-duration were also recorded in an oddball condition in order to compare the two paradigms. Similar MMNs in the two paradigms would suggest that they tap the same processes. This would promote the usefulness of the more time-efficient multi-feature paradigm for future studies in children. Methods: MMNs to five deviant types were recorded in the multi-feature paradigm in which these de…

Are Vowels and Consonants Processed Differently? Event-related Potential Evidence with a Delayed Letter Paradigm

2008

Abstract To investigate the neural bases of consonant and vowel processing, event-related potentials (ERPs) were recorded while participants read words and pseudowords in a lexical decision task. The stimuli were displayed in three different conditions: (i) simultaneous presentation of all letters (baseline condition); (ii) presentation of all letters, except that two internal consonants were delayed for 50 msec (consonants-delayed condition); and (iii) presentation of all letters, except that two internal vowels were delayed for 50 msec (vowels-delayed condition). The behavioral results showed that, for words, response times in the consonants-delayed condition were longer than in the vowel…

Gender role portrayals and sexism in Spanish magazines

2007

PurposeThe purpose of the paper is to analyse the male and female stereotypes in Spanish magazine advertising during the last three decades of the twentieth century in order to determine if they reflect or not the important cultural changes of Spanish society in these years.Design/methodology/approachContent analysis of 1,033 different advertisements randomly selected. To ensure reliability two independent codifiers of opposite gender worked together, one as an analyst and other as a judge. Three agreement indices were calculated.FindingsUse of male and female portrayals has undergone relevant changes in the last 30 years in accordance with the social evolution of Spain. For both men and wo…