Deliverable 4.4 - INSEAD CALT

AtGentive IST-4-027529-STP - Attentive Agents for Collaborative Learnersword was displayed on the screen. The word could randomly appear in one of fourpositions, at each corner of the video (Figure 5). Both the word and the video(showing Colette in the rest position) remained visible on the screen until theparticipant pressed a key.Figure 5. Experimental layoutThe verbal stimuli (positive and negative words N=94) were selected from the list ofemotional words developed and tested by (Larsen et al., 2006). These words arecompletely balanced on length, frequency of use and orthographic neighbourhoodsize, thus overcoming an important threat to internal validity of word recognitionexperiments due to variations of lexical characteristics.Three lists were constructed by randomly pairing words with videos, with theconstraint that each video-word combination was represented by 14 items. For eachparticipant one of the three lists was randomly selected at the time of the experiment.4.1.3 ProcedureThe experiment was implemented on DirectRT and displayed on a Dell Latitude D600laptop (screen size 14’’; screen resolution 1400 x 1050 pixels). Participants weretested individually. The experiment was introduced by written and verbal instruction,and the experimenter left the room as soon as she ensured that the participant hadunderstood the task. Participants were told to evaluate if the word displayed on thescreen was a positive or a negative by pressing one of two pre-set keys. Theanimations were to be ignored and participants were invited to act as quickly aspossible, while maintaining high accuracy.The first 10 trials acted as a practice sequence. They were followed by 84experimental trials.Del 4.4: AtGentive Final Evaluation Report – Appendix A page 15