Selective attention and the auditory vertex potential. 2: Effects of signal intensity and masking noise

A randomized sequence of tone bursts was delivered to subjects at short inter-stimulus intervals with the tones originating from one of three spatially and frequency specific channels. The subject's task was to count the tones in one of the three channels at a time, ignoring the other two, and press a button after each tenth tone. In different conditions, tones were given at high and low intensities and with or without a background white noise to mask the tones. The N sub 1 component of the auditory vertex potential was found to be larger in response to attended channel tones in relation to unattended tones. This selective enhancement of N sub 1 was minimal for loud tones presented without noise and increased markedly for the lower tone intensity and in noise added conditions

Selective attention and the auditory vertex potential. 1: Effects of stimulus delivery rate

Enhancement of the auditory vertex potentials with selective attention to dichotically presented tone pips was found to be critically sensitive to the range of inter-stimulus intervals in use. Only at the shortest intervals was a clear-cut enhancement of the latency component to stimuli observed for the attended ear

Parent and Adolescent Temperaments and the Quality of Parent-Adolescent Relations

Adolescent and parent temperaments as predictors of the quality of parent-adolescent relations were examined. Participants were 88 seventh-grade adolescents and their mothers and fathers. All three family members provided reports of their own levels of activity and adaptability. Mothers, fathers, and adolescents also reported on acceptance, psychological control, lax discipline, and conflict in the parent-adolescent dyad. Multivariate multiple regressions with follow-up univariate tests indicated a complex set of relations between adolescent and parent temperaments and parent-adolescent relations. In some cases, parent and adolescent temperaments interacted to predict specific aspects of parent-adolescent relations. There were also gender-of-parent and gender-of-adolescent differences in the associations between temperament and parent-adolescent relations. These results are consistent with the goodness-of-fit model of temperament

Statistics of Lead Changes in Popularity-Driven Systems

We study statistical properties of the highest degree, or most popular, nodes in growing networks. We show that the number of lead changes increases logarithmically with network size N, independent of the details of the growth mechanism. The probability that the first node retains the lead approaches a finite constant for popularity-driven growth, and decays as N^{-phi}(ln N)^{-1/2}, with phi=0.08607..., for growth with no popularity bias.Comment: 4 pages, 4 figures, 2 column revtex format. Minor changes in response to referee comments. For publication in PR

Modification of glassy carbon nanoparticles using titanium nanoparticles as a platform for determining diclofenac sodium

This article presents an investigation on the behavior of a chemically modified glassy carbon electrode as a sensing platform for the detection of Diclofenac Sodium. The study also explores the potential application of this electrode in analyzing real samples, including blood, urine, and wastewater. In addition, the synthesis of Titanium Nanoparticles and filaments used in the electrode modification was carried out using a novel method developed by our research group. This unique combination of materials has significantly enhanced the novelty of the technology, as no previous studies have reported such a combination

Estimating frequencies of emotions and actions: a web-based diary study

Mental health questionnaires often ask respondents to report how frequently they experience different emotions. We report two experiments designed to assess the accuracy of these reports and the strategies used to generate them. Each day for 2 weeks, participants in Experiment 1 filled out a web-based emotions-and-activities checklist. Then, they estimated the diary-period frequency of these emotions and activities and indicated how they generated each estimate. In Experiment 2, participants provided frequency estimates and strategy reports, but did not fill out the checklist. We found that (a) the frequency estimates were quite accurate for emotions and activities, (b) participants relied on memory-based strategies (enumeration and direct retrieval) when estimating activity frequencies, but (c) used self-knowledge strategies (personality beliefs and schematic inferences) somewhat more than memory strategies for emotions and (d) the relationship between strategy use and question type was unaffected by diary keeping. We conclude by considering practical and theoretical implications. Copyright © 2007 John Wiley & Sons, Ltd.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/55948/1/1303_ftp.pd