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  1. Sarah J. Forbes, Helena M. Purkis & Ottmar V. Lipp (2011). Better Safe Than Sorry: Simplistic Fear-Relevant Stimuli Capture Attention. Cognition and Emotion 25 (5):794-804.
    It has been consistently demonstrated that fear-relevant images capture attention preferentially over fear-irrelevant images. Current theory suggests that this faster processing could be mediated by an evolved module that allows certain stimulus features to attract attention automatically, prior to the detailed processing of the image. The present research investigated whether simplified images of fear-relevant stimuli would produce interference with target detection in a visual search task. In Experiment 1, silhouettes and degraded silhouettes of fear-relevant animals produced more interference than did (...)
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  2. Helena M. Purkis & Ottmar V. Lipp (2009). Are Snakes and Spiders Special? Acquisition of Negative Valence and Modified Attentional Processing by Non-Fear-Relevant Animal Stimuli. Cognition and Emotion 23 (3):430-452.
  3. Ottmar V. Lipp & Helena M. Purkis (2005). No Support for Dual Process Accounts of Human Affective Learning in Simple Pavlovian Conditioning. Cognition and Emotion 19 (2):269-282.
    Dual process accounts of affective learning state that the learning of likes and dislikes reflects a learning mechanism that is distinct from the one reflected in expectancy learning, the learning of signal relationships, and has different empirical characteristics. Affective learning, for example, is said not to be affected by: (a) extinction training; (b) occasion setting; (c) cue competition; and (d) awareness of the CS-US contingencies. These predictions were tested in a series of experiments that employed simple Pavlovian conditioning procedures. Neutral (...)
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  4. Helena M. Purkis & Ottmar V. Lipp (2001). Does Affective Learning Exist in the Absence of Contingency Awareness? Learning and Motivation 32 (1):84-99.