| Popis: |
In this experiment, we aim to replicate and extend the findings of Experiment 1. The current study aims to investigate whether a visible weapon, a holstered weapon, and/or an unusual object produce a weapon focus effect (WFE). Previous studies have found a WFE—that is, poorer recall of perpetrator and scene details when a weapon compared to a neutral object is present, but only a few studies have found a WFE for lineup decisions (Erickson, Lampinen, & Leding, 2014; Carlson, & Carlson, 2012, 2014). The research literature has proposed two hypotheses to account for the WFE: the threat/arousal hypothesis and the unusualness hypothesis (Kocab & Sporer, 2016). There is limited work available that tests the WFE using physiological measures. This study attempts to test the above hypotheses and add to the current literature. We will measure physiological arousal via galvanic skin response and gaze behaviour via eye-tracking software, in order to examine support for these hypotheses. We will also measure recall and recognition, lineup decision making, and confidence. Participants will view a mock-crime video, then they will be asked to describe what happened and the perpetrator. After engaging in an intervening task, participants will be shown either a target-present or target-absent lineup. After the lineup decision, participants will provide a confidence rating for their decision. Participants who do not make an identification will be asked to view the lineup for a second time and make a forced choice response, so that we can explore whether ability to make correct identifications is reduced or willingness to identify is reduced in the weapon focus effect. |
