Rebecca Todd

 
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Associate Professor

Research Classification

Cognition
Motivation, Emotions and Rewards
Learning and Memory

Research Interests

Human Cognition and Emotion
Motivationally and affectively biased attention and memory
Emotional learning (associative learning of reward and punishment)
Human Neurocognitive processes underlying all of the above

Relevant Degree Programs

 

Research Methodology

My lab uses computer-based behavioural measures, as well as psychophysiological, eye tracking, EEG, and functional brain imaging measures.

Graduate Student Supervision

Master's Student Supervision (2010-2017)
The influence of appetitive and aversive stimuli on subjective temporal acuity (2017)

Anecdotal reports that time “flies by” or “slows down” during emotional events are supported by evidence that the motivational relevance of stimuli influences subsequent duration judgments. Yet it is unknown whether the subjective quality of events as they unfold is altered by motivational relevance. In a novel paradigm, we measured the subjective experience of moment-to-moment visual perception. Participants judged the temporal smoothness of high-approach positive (desserts), negative (e.g. bodily mutilation), and neutral images (commonplace scenes) as they faded to black. Results revealed approach-motivated blurring (AMB), such that positive stimuli were judged as smoother and negative stimuli as choppier relative to neutral stimuli. Participant ratings of approach-motivation predicted perceived fade smoothness after controlling for low-level stimulus features. Electrophysiological data indicated AMB modulated relatively rapid perceptual activation. Results indicate that stimulus value influences subjective temporal perceptual acuity, with approach-motivating stimuli eliciting perception of a “blurred” frame rate characteristic of speeded motion.

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News Releases

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