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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
251

A developmental study of visual attention : spatial and temporal effects in visual filtering

Dawkins, Tamara January 2007 (has links)
No description available.
252

Orienting of visual attention among persons with autism spectrum disorders : reading versus responding to symbolic cues

Landry, Oriane January 2006 (has links)
No description available.
253

A developmental study of visual filtering /

Dagenais, Catherine January 1992 (has links)
No description available.
254

The relationship between attentional inertia and recognition memory.

Burns, John J. 01 January 1988 (has links) (PDF)
No description available.
255

Inertial effects in television viewing.

Miskiewicz, Rosemarie 01 January 1980 (has links) (PDF)
Visual attention of 300 three- and five-year-old children viewing 15 hour-long Sesame Street programs in the presence of an audiovisual slide distractor was examined to establish the existence and nature of attentional inertia, defined as the increased tendency to continue looking at TV the longer one has been viewing. Three major analytic approaches were employed: 1) plotting the conditional probability function, p ( look . /look. ) , where t = look length; 2) seeking inertial effects between looks and between pauses by examining the relationship between adjacent look and pause lengths; and 3) seeking inertial effects across episodes by examining the relationship between look and pause lengths before and after bit and slide boundaries. Using TV attention data, slide attention data, and pauses in attention both to the TV and slides, a sufficient body of evidence was accumulated to conclude that attentional inertia does exist. With regard to the nature of attentional inertia, the consistent carry-over effects across bit and slide boundaries demonstrated that attentional inertia is not strictly episode-bound . All results revealed inert ial effects that were episode-free in nature. However, no results were obtained that eliminated the possibility that both episode-bound and episode-free inertia may be functioning simultaneously in visual attention. No age effects were found, and curvilinear functions were consistently obtained, suggesting that inertial effects do not continue indefinitely but eventually reach and maintain a plateau . The significance of the attentional inertia phenomenon to TV viewing and to behavior in general was discussed.
256

Cortical evoked responses and detection efficiency in man.

Isgur, Jay 01 January 1969 (has links) (PDF)
No description available.
257

Exposure to television and attention in preschoolers.

Collins, Patricia A. 01 January 1990 (has links) (PDF)
No description available.
258

The effect of object boundaries on the flow of attention.

Büchner, Simon J. 01 January 2005 (has links) (PDF)
No description available.
259

Biologische Marker für Aufmerksamkeitsverzerrungen bei sozialer Ängstlichkeit und deren Modifikation / Biological Markers for Attentional Bias in Social Anxiety and its Modification

Reutter, Mario January 2019 (has links) (PDF)
Diese Dissertationsschrift beschäftigt sich mit biologischen Korrelaten von Aufmerksamkeits-verzerrungen und eruiert deren Modifikation in einem längsschnittlich angelegten Experiment. Hierfür wurden über 100 sozial-ängstliche Teilnehmer mit Hilfe einer Screening-Prozedur gewonnen und hinsichtlich der Ausprägung einer ereigniskorrelierten Lateralisation namens „N2pc“ untersucht. Während der ersten Labormessung indizierte die N2pc bei der Bearbeitung eines Dot Probe Paradigmas einen mittelgroßen, statistisch hochbedeutsamen Attentional Bias hin zu wütenden Gesichtern im Vergleich zu neutralen. Das hierfür klassischerweise verwendete Maß von Reaktionszeitunterschieden hingegen konnte diese Verzerrung der Aufmerksamkeit nicht abbilden. Ferner zeigten weder die elektrophysiologische noch die behaviorale Messgröße einen Zusammenhang mit Fragebögen sozialer Angst, was teilweise auf ein Fehlen interner Konsistenz zurückgeführt werden kann. Im weiteren Verlauf absolvierten die überwiegend weiblichen Teilnehmer an acht unterschiedlichen Terminen über zwei bis vier Wochen fast 7000 Durchgänge eines Aufmerksamkeitsverzerrungsmodifikationstrainings oder einer aktiven Kontrollprozedur. Daraufhin zeigte sich eine Auslöschung der ereigniskorrelierten Lateralisation, allerdings in einem späteren Zeitfenster als erwartet. Dieses Verschwinden des Attentional Bias blieb bis elf Wochen nach Ende der Trainingsprozedur stabil. Außerdem trat dieselbe Modifikation ebenfalls für die Kontrollgruppe auf. Die selbstberichtete Schwere der Symptomausprägung veränderte sich zwar nicht, allerdings konnte eine Reduktion des Persönlichkeitsmerkmals Neurotizismus verzeichnet werden, welches konzeptuell mit dem Begriff der Ängstlichkeit eng verwoben ist. Durch explorative Folgeanalysen konnte eine stärkere Modulation der rechten Großhirnhälfte, also durch Reize im linken visuellen Halbfeld aufgedeckt werden. Eine Neuberechnung des Attentional Bias separat für jede Hemisphäre scheint daher auch für künftige Untersuchungen angebracht. Ferner wurde als Träger der Modifikation über die Zeit eine Veränderung der Hyperpolarisation nach der N2-Komponente identifiziert. Ob durch eine Anpassung der Prozedur eine Modulation einer früheren ereigniskorrelierten Komponente erzielt werden kann, bleibt zum aktuellen Zeitpunkt unbeantwortet. / This dissertation is concerned with biological correlates of attentional biases and investigates their modification within a longitudinal experiment. For this purpose, more than 100 socially anxious participants were recruited with the aid of on online screening procedure. These individuals were examined with respect to the occurrence of an event-related lateralization called “N2pc”. During the first experimental session, the N2pc indexed a highly significant attentional bias of medium size toward angry compared to neutral faces within a Dot Probe paradigm. In contrast, reaction time differences, which are typically utilized for this purpose, could not represent this distortion of attention. Moreover, neither electrophysiological nor behavioral measures were related to questionnaires of social anxiety which in part can be attributed to a lack of internal consistency. In the further process, the predominantly female participants completed close to 7000 trials of an attentional bias modification training or of an active control procedure on eight different days within a period of two to four weeks. Thereupon, the event-related lateralization was extinguished, albeit during a later time window than expected. This disappearance of an attentional bias remained stable until eleven weeks after completion of the training procedure. This very modification also occurred within the control procedure. While extent of self-reported symptoms did not change, a reduction of the personality trait neuroticism could be observed which is closely tied to the concept of anxiety. By means of explorative follow-up analyses, an exaggerated modulation of the right cerebral hemisphere, i.e. by stimuli in the left visual hemifield could be unveiled. A recalculation of the attentional bias score separately for each hemisphere seemed appropriate also for future investigations. Furthermore, a shift in hyperpolarization after the N2 component has been identified as the carrier of this modification. Whether adjusting the procedure will allow for earlier modulations of event-related components remains unanswered for now.
260

Auditory Pattern Preference as a Function of Informational Content

Overmier, James Bruce January 1962 (has links)
No description available.

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