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51.
Villarino Vivas A Reales Avilés JM Fontes de Gracia AI Fontes de Gracia S 《Psicothema》2008,20(2):331-336
Taking into account the studies about the measure of sensitivity in magnitude estimation tasks, we analyze the three most common measures used in this topic: Pearson's product-moment correlation between the logarithm of the stimulus and the logarithm of the response (R), the exponent of Stevens' power function (K), and the measure "M" proposed by Garriga-Trillo. Using a sample of participants greater than usual in psychophysical studies (180 participants), we designed an experiment with two sets of stimuli with different stimulus ranges. In each of these sets, we used two kinds of stimuli (line segments and squares). Our conclusions were: (1) we rejected the use of K as a sensitivity measure because the results provided by this index were the opposite of those expected when we compared the two stimulus ranges. (2) We also rejected the use of M because this measure is a linear transformation of Kendall's coefficient of concordance. (3) Lastly, we suggest the mathematical transformation proposed by Fisher to achieve a normal distribution, and recommend this transformation as the best sensitivity measure. 相似文献
52.
The role of information in the processes underlying kinematic trajectory-formation was examined by manipulating the relation between effector space (movement of a hand-held stylus on a graphics tablet) and task space (movement of a cursor on a screen where targets were presented) in a precision aiming task with five different levels of task difficulty. Movement patterns were found to evolve as a function of the flow of information in task space, with participants (N = 13) producing more rapid and more fluent movements when the mapping between spaces included the softening-spring characteristics typical of behavioural patterns at higher levels of task difficulty. We conclude that the kinematic changes (movement time and pattern) observed when task difficulty increases result from informational influences. Information affects behavioural dynamics at the level of the parameters without affecting the underlying dynamical structure. 相似文献
53.
Existing research on the Spanish-language translation of the Personality Assessment Inventory (PAI; L. C. Morey, 1991) suggests that the validity scales from the English- and Spanish-language versions may not be equivalent measures. In the current study, 72 bilingual participants completed both the English- and Spanish-language versions of the PAI under the instructions to respond honestly, to overreport psychopathology for an insanity case, or to underreport psychopathology for an employment evaluation. Overall, the English- and Spanish-language validity scales performed similarly, and scores from the Negative Impression Management and the Positive Impression Management scales demonstrated the highest levels of equivalence and accuracy for the identification of simulators across language versions. 相似文献
54.
Maldonado EF Fernandez FJ Trianes MV Wesnes K Petrini O Zangara A Enguix A Ambrosetti L 《The Spanish journal of psychology》2008,11(1):3-15
The aim of the present study was to assess the effects of daily stress perception on cognitive performance and morning basal salivary cortisol and alpha-amylase levels in healthy children aged 9-12. Participants were classified by whether they had low daily perceived stress (LPS, n = 27) or a high daily perceived stress (HPS, n = 26) using the Children Daily Stress Inventory (CDSI). Salivary cortisol and alpha-amylase were measured at awakening and 30 minutes later. Cognitive performance was assessed using the Cognitive Drug Research assessment system. The HPS group exhibited significantly poorer scores on speed of memory (p < .05) and continuity of attention (p < .05) relative to the LPS group. The HPS group also showed significantly lower morning cortisol levels at awakening and at +30 minutes measures in comparison with the LPS group (p < .05), and mean morning cortisol levels were negatively correlated with speed of memory (p < .05) in the 53 participants. No significant differences were observed between both groups in alpha-amylase levels. These findings suggest that daily perceived stress in children may impoverish cognitive performance via its modulating effects on the HPA axis activity. 相似文献
55.
Mental workload and visual impairment: differences between pupil, blink, and subjective rating 总被引:1,自引:0,他引:1
This research has two aims: (a) To study the concurrent validity of three measures of mental workload, NASA TLX rating scale, pupil dilation and blink rate, testing the hypothesis that they will provide convergent results using a single-task, and dissociative results for dual-task; and (b) To analyse their capability to predict visual search impairment. These three measures were analyzed in the same cognitive tasks in single-task and dual-task (cognitive task and visual search) conditions in a within-subjects experiment with twenty-nine participants. Mental workload measures showed concurrent validity under single-task condition, but a complex pattern of results arose in the dual-task condition: it is suggested that NASA TLX would be a subjective addition of the rating of each task; pupil dilation would measure the average arousal underlying the cognitive tasks; and the blink rate would produce opposite effects: whereas mental workload of cognitive tasks would increase blink rate, visual demand would inhibit it. All three measures were good predictors of visual impairment. The soundness of these measures is discussed with regard to the applied field of driving and other activities. 相似文献
56.
57.
Cathy M. Craig Cédric Goulon Eric Berton Guillaume Rao Laure Fernandez Reinoud J. Bootsma 《Attention, perception & psychophysics》2009,71(3):515-522
Although many studies have looked at the perceptual—cognitive strategies used to make anticipatory judgments in sport, few have examined the informational invariants that our visual system may be attuned to. Using immersive interactive virtual reality to simulate the aerodynamics of the trajectory of a ball with and without sidespin, the present study examined the ability of expert and novice soccer players to make judgments about the ball’s future arrival position. An analysis of their judgment responses showed how participants were strongly influenced by the ball’s trajectory. The changes in trajectory caused by sidespin led to erroneous predictions about the ball’s future arrival position. An analysis of potential informational variables that could explain these results points to the use of a first-order compound variable combining optical expansion and optical displacement. 相似文献
58.
by Leonard Angel 《Zygon》2009,44(3):699-718
Extension of the system that includes the key substrates for sensation, perception, emotion, volition, and cognition, and all representational sources for cognition, supports the view that there is an extended mind and an extended body. These intellectual views can be made practical in a humanist system based on extensions and in religious systems based on extensions. Independently, there is also an institutional extension of secularism. Hence, I maintain, there are five principal forms of extension. 相似文献
59.
In the present study, we used the Deese/Roediger-McDermott paradigm to analyze the relationship between theme identifiability
of word lists and false memories in adults and children. We conducted two normative studies to determine the identifiability
levels for critical unpresented words in 40 associative lists in adults and in 16 associative lists in children. Then, in
three experiments, false memories for critical words that were either easy or hard to identify were analyzed in adults and
in children 4–5 years old and 11–12 years old. Opposite results were found for adults and children. Lists with highly identifiable
critical words produced fewer false memories for adults but more false memories for children. These results suggest that,
if they can identify critical words, adults use an identify-to-reject strategy to edit out false memories, whereas, in children,
theme identification does not lead to the use of such a monitoring strategy. 相似文献
60.
Siu-kuen Azor Hui Rex A. Wright Christopher C. Stewart Angel Simmons Bradley Eaton R. Nicholas Nolte 《Motivation and emotion》2009,33(4):419-434
Female undergraduates were assigned to one of three groups, two involving regulatory training and one not. Training participants
performed for 2 weeks tasks that required strong behavioral restraint (Strong Training) or weak behavioral restraint (Weak
Training). Later, they took part in (1) a laboratory session in which they performed tasks with inhibitory components, and
(2) a follow-up week in which they provided health behavior reports and used designated dental supplies. No Training participants
took part only in the session and follow-up week. As expected, laboratory performance was improved for Strong- relative to
No Training participants, with performance for Weak Training participants falling in between. Also as expected, Strong Training
participants used more floss in the follow-up week than did the No Training participants, with floss for Weak Training participants
falling between. Contrary to expectation, Strong Training participants used less toothpaste and reported having brushed less
than the No Training participants. In addition, Strong Training participants evinced exaggerated—rather than diminished—cardiovascular
responses during the laboratory tasks. The performance and floss use data support the suggestion that inhibitory system strength
can be increased through use. The brushing and cardiovascular findings may be interpretable in inhibitory strength terms. 相似文献