Search results for " Discrimination"

Comprehensive auditory discrimination profiles recorded with a fast parametric musical multi-feature mismatch negativity paradigm

2016

Abstract Objective Mismatch negativity (MMN), a component of the auditory event-related potential (ERP) in response to auditory-expectancy violation, is sensitive to central auditory processing deficits associated with several clinical conditions and to auditory skills deriving from musical expertise. This sensitivity is more evident for stimuli integrated in complex sound contexts. This study tested whether increasing magnitudes of deviation (levels) entail increasing MMN amplitude (or decreasing latency), aiming to create a balanced version of the musical multi-feature paradigm towards measurement of extensive auditory discrimination profiles in auditory expertise or deficits. Methods Usi…

On minima of discrimination functions

2008

Abstract A discrimination function ψ ( x , y ) assigns a measure of discriminability to stimulus pairs x , y (e.g., the probability with which they are judged to be different in a same-different judgment scheme). If for every x there is a single y least discriminable from x , then this y is called the point of subjective equality (PSE) for x , and the dependence h ( x ) of the PSE for x on x is called a PSE function. The PSE function g ( y ) is defined in a symmetrically opposite way. If the graphs of the two PSE functions coincide (i.e.,  g ≡ h − 1 ), the function is said to satisfy the Regular Minimality law. The minimum level functions are restrictions of ψ to the graphs of the PSE funct…

Event-Related Potentials and Autonomic Responses to a Change in Unattended Auditory Stimuli

1992

Event-related brain potentials (ERPs) and autonomic nervous system (ANS) responses to occasional pitch and rise-time changes in a task-irrelevant auditory stimulus repeating at short intervals were measured while the subject performed a difficult intellectual task (Raven Matrices). It was found that deviant stimuli elicited the mismatch negativity (MMN) component of the ERP even when they elicited no ANS response. There was no significant difference in the mismatch negativity between trials in which the skin conductance response was or was not elicited. The pitch deviant tone also elicited heart rate deceleration, whereas the rise-time deviant tone tended to elicit a later heart rate accele…

Discrimination of tonal and atonal music in congenital amusia: The advantage of implicit tasks

2016

International audience; Congenital amusia is a neurodevelopmental disorder of music perception and production, which has been attributed to a major deficit in pitch processing. While most studies and diagnosis tests have used explicit investigation methods, recent studies using implicit investigation approaches have revealed some unimpaired pitch structure processing in congenital amusia. The present study investigated amusic individuals' processing of tonal structures (e.g., musical structures respecting the Western tonal system) via three different questions. Amusic participants and their matched controls judged tonal versions (original musical excerpts) and atonal versions (with manipula…

Practice effects on visuomotor and problem-solving tests by children.

2001

Practice effects on a visuomotor test (the Developmental Test of Visuo-Motor Integration), a timed visual discrimination test (the Underlining Test), and two problem-solving tests (the Porteus Mazes Test and the Tower of Hanoi Test) were analyzed. Children of two age groups ( Ms: 7.7 and 11.6 yr.) were chosen to study the effect of age on practice effects. The tests were repeated nine times with test-retest intervals of 2 mo. The Developmental Test of Visuo-Motor Integration showed no practice effects, while the Porteus Mazes Test, the Underlining Test, and the Tower of Hanoi Test showed significant practice effects. Practice effects were larger for the older age group on all the tests, ex…

Acculturation profiles, psychosocial adaptation and perceived discrimination among Tunisian adolescents

2014

The study refers to data coming from the Italian section of MIRIPS project. It was focused on the analysis of the adaptation of Tunisian adolescents living in Italy and it was guided by the integration hypothesis, stating that migrants feel better if they are engaged in both their own culture and that of the larger society than if they engage in one or the other culture only. Using a person-oriented approach, the study investigated the relationships between acculturation profiles - namely patterns of relations between factors associated to the acculturation process (e.g., acculturation strategies, ethnic and national identities, ethnic and national language use, social contacts with people …

Neural discrimination of nonprototypical chords in music experts and laymen:an MEG study

2009

Abstract At the level of the auditory cortex, musicians discriminate pitch changes more accurately than nonmusicians. However, it is not agreed upon how sound familiarity and musical expertise interact in the formation of pitch-change discrimination skills, that is, whether musicians possess musical pitch discrimination abilities that are generally more accurate than in nonmusicians or, alternatively, whether they may be distinguished from nonmusicians particularly with respect to the discrimination of nonprototypical sounds that do not play a reference role in Western tonal music. To resolve this, we used magnetoencephalography (MEG) to measure the change-related magnetic mismatch response…

Processing of speech and non-speech sounds in the language-related cortex compared between dyslexic and normal-reading adults : fMRI-study

2000

Zasada pozytywnej dyskryminacji mniejszości narodowych w ujęciu teoretycznym i praktyce ustrojowej

2018

CEL NAUKOWY: Celem artykułu jest zbadanie teoretycznych aspektów zasady pozytywnej dyskryminacji, ustrojowych uwarunkowań jej zastosowania w odniesieniu do mniejszości narodowych w Polsce oraz dziedzin, w których może być realizowana. PROBLEM I METODY BADAWCZE: Zagadnienie pozytywnej dyskryminacji znajduje się w obrębie zainteresowania przedstawicieli wielu nauk i idealnie wpasowuje się w koncepcję demokracji ujmowanej jako wartości, procedury i w sensie substancjalnym. Nie jest ona przy tym ochroną antydyskryminacyjną, lecz jej wsparciem, promotorem równości formalnej i faktycznej. W Polsce, choć odsetek mniejszości narodowych jest nikły, pozytywna dyskryminacja ma rangę zasady w Konstytuc…

Influence of the suspension of continued treatment with flurazepam and amobarbital on two discrimination learning schedules.

1977

The authors have studied the effect of the suspension of chronic treatment with flurazepam and amobarbital on the operant behavior of rats that for the first time were in the presence of two fixed-interval discrimination schedules. With the sound discrimination schedule, the responses emitted by the treated animals had characteristics similar to those of control animals. With the temporal discrimination schedule, though it is not possible to distinguish between learning rates, modifications in the intensity of the effect (increases in lever pressing) indicate that, considering the doses, the action of flurazepam is slight and that of amobarbital clear and statistically significant.