Subliminal perception is defined as a process whereby a subject reports no awareness of a visual stimulus, and yet his/her verbal behavior, subjectively experienced as “guesses”, is influenced by the stimulation. Various studies have found evidence for and against subliminal perception using discrimination tasks and subjective judgments. Explanations of subliminal perception include the partial cue hypothesis, the theory of perception of structural differences, and the theory that responses to subliminal stimuli are of a semantic nature. This study was conducted to determine whether subliminal perception involves a discrimination of structural characteristics or a discrimination of the semantic quality of words prior to specific identification. It was also an attempt to find the relationship between the level of stimulus awareness and the type of response.

<p>Subconsciously processed fearful stimuli are routed via the limbic system directly from the thalamus to the amygdala and can automatically trigger physical and behavioural fear responses to prevent humans from getting injured. The purpose of this study was to investigate if there were any autonomic responses to stimuli containing positive valence and a high arousal level. The stimuli were normative pictures, picked from the IAPS that were presented subliminally in a masked condition. Reactions were measured by skin conductance responses. Changes of SCR were registered when the participants were exposed to negative, positive and neutral stimuli. Responses were strongest as the participants were exposed to the positive pictures. These findings support that there could be more functions to automatic responding than a direct survival purpose. Further research needs to be done to investigate what functions these kinds of responses constitute.</p>

Subconsciously processed fearful stimuli are routed via the limbic system directly from the thalamus to the amygdala and can automatically trigger physical and behavioural fear responses to prevent humans from getting injured. The purpose of this study was to investigate if there were any autonomic responses to stimuli containing positive valence and a high arousal level. The stimuli were normative pictures, picked from the IAPS that were presented subliminally in a masked condition. Reactions were measured by skin conductance responses. Changes of SCR were registered when the participants were exposed to negative, positive and neutral stimuli. Responses were strongest as the participants were exposed to the positive pictures. These findings support that there could be more functions to automatic responding than a direct survival purpose. Further research needs to be done to investigate what functions these kinds of responses constitute.

Intrinsic motion pertains to the relative movements of a character’s body parts while mobile, while extrinsic motion pertains to those movements in relation to external landmarks. The current study aimed to explore whether the removal of identifiable features of a person (race and color of clothing) would force witnesses to move their focus to extrinsic motion. Previous studies regarding the concept of intrinsic and extrinsic motion have found that witnesses are more likely to encode intrinsic motion with the identity of a person, while extrinsic motion is encoded separately. This made it easier for participants to recognize an actor based on their manner of movement, rather than where the actor was initially seen. By silhouetting the actors and manipulating the background they were shown in later, the current study was able to identify a negative impact on recognition ability when actors were shown against a background they were not initially shown against while silhouetted. The implications of these results are discussed. / Includes bibliography. / Thesis (M.A.)--Florida Atlantic University, 2019. / FAU Electronic Theses and Dissertations Collection

Thesis (Ph. D.)--University of Oklahoma, 1991. / Includes bibliographical references.

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Thesis (M. S.)--Psychology, Georgia Institute of Technology, 2010. / Committee Chair: Lawrence R. James; Committee Member: Jack Feldman; Committee Member: Richard Catrambone. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Three aspects of stimulus content, i.e. meaningfulness, familiarity and task relevance, were manipulated without the subjects awareness. A number of subliminal (backward-masked) stimuli were presented to the subject whose task it was to estimate an interval of 1 sec (starting with the presentation-flash) by pressing a button. Supraliminal words were randomly interspersed among these, subliminal stimuli, appearing above or below the masked field. Whenever the subject detected a previously assigned target among the supraliminal stimuli, he/she was required to press the button as fast as possible. The meaningfulness of the subliminal material was manipulated using words, nonwords and blanks. Three groups of words were used: the targets, the nontargets and other, 'new' words (which were never presented supraliminally). Task relevance (targets vs. nontargets) and familiarity ('new' words vs. other words) were thus manipulated. Unexpectedly, detection performance was better with words than with nonwords. This suggests that detection is a late process drawing on lexical information. Several components of the event related potential (ERP) differentiated as early as 140 msec poststimulus between sub-and supraliminal conditions. More importantly, differences within the subliminal conditions were observed: familiarity was discriminated after 260 msec and simple presence of a string after 300 msec. These results are consistent with the conclusions drawn from detection performance, and they support the notion that backward masking does not disrupt processing. / Arts, Faculty of / Psychology, Department of / Graduate

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O objetivo central desse trabalho é entender as reais possibilidades de participação de elementos subliminares no processo de persuasão publicitária. Para isso, o modelo AIDA foi utilizado em conjunto com estudos científicos que evidenciam e esclarecem as reações de um indivíduo exposto a estímulos subliminares utilizados como estímulos preparatórios para a recepção de estímulos conscientes. / The main goal of this research is to clarify the actual limits of subliminal elements in advertising persuasiveness. For that matter, the AIDA model was used combined with scientific studies in order to provide better understading of an individual\'s reaction to subliminal stimuli used as primes for regular, conscious stimuli.