Consulta: subjectFacets:"Reaction time"
Registros recuperados: 8
Data/hora: 04/06/2024 00:18:10

Relationships between physiological and behavioral responses of goat bucks in mating season
Provedor de dados: 96
Autores: Karaca,Serhat; Yılmaz,Ayhan; Ser,Gazel; Sarıbey,Muammer.
ABSTRACT The objective of this study was to determine the sexual parameters in young bucks with different sexual activity and the effect of experience (age) on sexual parameters in bucks. Fifteen young, sexually inexperienced (SI) and five adult, sexually experienced (SE) Saanen × Hair goat crossbred bucks were used in this study. Bucks were individually exposed to three estrus does for 15-min periods during four sexual performance tests, which were carried out every other day to determine some sexual behavior traits such as flehmen response, reaction time, and ejaculation efficiency. Sexually inexperienced young bucks were evaluated based on their sexual activity (active (AC) vs inactive (IA)) and presence of horn. It was found that AC bucks had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Copulation; Experience; Reaction time; Test-day; Testosterone.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016001000608

Gap effect and reaction time distribution: simple vs choice manual responses
Provedor de dados: 56
Autores: Machado-Pinheiro,W.; Gawryszewski,L.G.; Ribeiro-do-Valle,L.E.
It is well known that saccadic reaction times (SRT) are reduced when the target is preceded by the offset of the fixation point (FP) - the gap effect. Some authors have proposed that the FP offset also allows the saccadic system to generate a separate population of SRT, the express saccades. Nevertheless, there is no agreement as to whether the gap effect and express responses are also present for manual reaction times (MRT). We tested the gap effect and the MRT distribution in two different conditions, i.e., simple and choice MRT. In the choice MRT condition, subjects need to identify the side of the stimulus and to select the appropriate response, while in the simple MRT these stages are not necessary. We report that the gap effect was present in both...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Attention; Reaction time; Gap effect; Vision; Express responses.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001000012

Behavioral modulation by mutilation pictures in women
Provedor de dados: 56
Autores: Pereira,M.G.; Volchan,E.; Oliveira,L.; Machado-Pinheiro,W.; Rodrigues,J.A.; Nepomuceno,F.V.P.; Pessoa,L.
Previous studies have shown that women are more emotionally expressive than men. It is unclear, however, if women are also more susceptible to the emotional modulation of behavior imposed by an affective stimulus. To investigate this issue, we devised a task in which female subjects performed six sequential trials of visual target detection following the presentation of emotional (mutilation and erotic) or neutral pictures (domestic utensils and objects) and compared the data obtained in the present study with those described in a previous study with male subjects. The experiment consisted of three blocks of 24 pictures and each block had an approximate duration of 4 min. Our sample consisted of 36 subjects (age range: 18 to 26 years) and each subject...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Emotion; Behavior; Reaction time; Sex differences; Affective stimulus.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300011

The control of deliberate waiting strategies in a stop-signal task
Provedor de dados: 56
Autores: Sylwan,R.P.
To inhibit an ongoing flow of thoughts or actions has been largely considered to be a crucial executive function, and the stop-signal paradigm makes inhibitory control measurable. Stop-signal tasks usually combine two concurrent tasks, i.e., manual responses to a primary task (go-task) are occasionally countermanded by a stimulus which signals participants to inhibit their response in that trial (stop-task). Participants are always instructed not to wait for the stop-signal, since waiting strategies cause the response times to be unstable, invalidating the data. The aim of the present study was to experimentally control the strategies of waiting deliberately for the stop-signal in a stop-task by means of an algorithm that measured the variation in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Attention; Stop-task; Reaction time; Vision; Executive functions; Laterality.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000600011

Influence of cueing on the preparation and execution of untrained and trained complex motor responses
Provedor de dados: 56
Autores: Alouche,S.R.; Sant’Anna,G.N.; Biagioni,G.; Ribeiro-do-Valle,L.E.
This study investigated the influence of cueing on the performance of untrained and trained complex motor responses. Healthy adults responded to a visual target by performing four sequential movements (complex response) or a single movement (simple response) of their middle finger. A visual cue preceded the target by an interval of 300, 1000, or 2000 ms. In Experiment 1, the complex and simple responses were not previously trained. During the testing session, the complex response pattern varied on a trial-by-trial basis following the indication provided by the visual cue. In Experiment 2, the complex response and the simple response were extensively trained beforehand. During the testing session, the trained complex response pattern was performed in all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cueing; Cue-target interval; Response complexity; Response practice; Reaction time; Movement time.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000500008

Facilitatory effects of an auditory warning stimulus in a visual location identification task and a visual shape identification task
Provedor de dados: 56
Autores: Bueno,V.F.; Ribeiro-do-Valle,L.E.
The occurrence of a weak auditory warning stimulus increases the speed of the response to a subsequent visual target stimulus that must be identified. This facilitatory effect has been attributed to the temporal expectancy automatically induced by the warning stimulus. It has not been determined whether this results from a modulation of the stimulus identification process, the response selection process or both. The present study examined these possibilities. A group of 12 young adults performed a reaction time location identification task and another group of 12 young adults performed a reaction time shape identification task. A visual target stimulus was presented 1850 to 2350 ms plus a fixed interval (50, 100, 200, 400, 800, or 1600 ms, depending on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Expectancy; Time course; Priming; Auditory temporal processing; Visual form processing; Reaction time.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001100007

The early facilitatory effect of a peripheral spatially noninformative prime stimulus depends on target stimulus features
Provedor de dados: 56
Autores: Azevedo,E.L.; Squella,S.A.F.; Ribeiro-do-Valle,L.E.
We investigated the dependency of the early facilitatory effect of a prime stimulus (S1) on the physical characteristics of the target stimulus (S2). A go-no go reaction time paradigm was used. The S1 was a gray ring and the S2s were a white vertical line, a white horizontal line, a white cross and a white small ring, all inside a white ring with the same dimensions as the S1. S1 onset-S2 onset asynchrony was 100 ms. The stimuli appeared randomly in any one of the quadrants of a monitor screen. The S2 could occur at the same position as the S1 or at a different one. We observed a strong facilitatory effect when the vertical line or the horizontal line was the go stimulus and no effect when the cross was the go stimulus. These results show that the features...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Priming; Attention; Forward masking; Vision; Reaction time.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000600017

Relative performance of the two hands in simple and choice reaction time tasks
Provedor de dados: 56
Autores: Nisiyama,M.; Ribeiro-do-Valle,L.E.
There is evidence that the left hemisphere is more competent for motor control than the right hemisphere. This study investigated whether this hemispheric asymmetry is expressed in the latency/duration of sequential responses performed by the left and/or right hands. Thirty-two right-handed young adults (16 males, 16 females; 18-25 years old) were tested in a simple or choice reaction time task. They responded to a left and/or right visual target by moving their left and/or right middle fingers between two keys on each side of the midline. Right hand reaction time did not differ from left hand reaction time. Submovement times were longer for the right hand than the left hand when the response was bilateral. Pause times were shorter for the right hand than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Motor lateral asymmetry; Reaction time; Movement time; Response complexity; Unilateral response; Bilateral response.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000100080