Ses related to interpersonal trust, with a particular focus on the insula. Areas of the insular cortex play a central role in processing of both thermal perception (Davis et al., 1998, 2004; Gelnar et al., 1999; Craig et al., 2000; Sawamoto et al., 2000; Brooks ?et al., 2002; Maihofner et al., 2002; Moulton, 2005) and trust information (Winston et al., 2002; Sanfey et al., 2003; Preuschoff et al., 2006, 2008; Rilling et al., 2008; Rolls et al., 2008; Todorov et al., 2008). This dual role led Williams and Bargh (2008) to suggest that the insula may be one route through which physical experiences with cold?The Author (2010). Published by Oxford University Press. For Permissions, please email: [email protected] (2011)Y Kang et al. . STUDY 1: EFFECTS OF TEMPERATURE ON TRUST BEHAVIOR Participants touched either a cold or a warm pack, and then played an economic trust game. We predicted and found that experience of physical cold (vs warm) decreases the amount of money invested in subsequent trust decisions. Methods Participants Thirty students (mean age ?19.7, s.d. ?2.6) provided written consent prior to participation according to the Declaration of Helsinki (BMJ 1991; 302: 1194), as approved by the Yale Institutional Review Board. All participants received either a course credit or cash ( 5) as compensation. Procedure An experimenter briefly explained that this study would involve two separate tasks: a consumer product evaluation and an online game. Then participants played five practice trials of the trust game before the temperature manipulation. Temperature manipulation. Participants were randomly assigned to either a cold or warm condition. The experimenter did not know the participants’ test conditions until just before the temperature task. To further minimize the chances that participants would become aware of the experimental hypotheses, a cover story was used to distinguish the temperature priming from the subsequent trust game tasks. Participants were told that, `We would like you to rate a specific consumer product. The product you will be rating is a therapeutic pack. Please hold the pack for 10 s and answer the following BLU-554 solubility questions.’ We used temperature packs (260 ?370 ?10 mm, MD Prime Co., Korea) that were prepared to be 158C (average) for the cold condition and 418C (average) for the warm condition, respectively (following Davis et al., 1998). The experimenter placed the pack on each participant’s left palm; after 10 s, the participant completed a consumer questionnaire with the pack still resting on their palm. The questionnaire consisted of three items: (i) pleasantness of the pack (1 ?very unpleasant; 7 ?very pleasant); (ii) effectiveness of the pack (1 ?very effective; 7 ?not effective at all); and (iii) whether they would recommend it to their friends (yes/no). Trust game. A version of a behavioral trust game (Berg et al., 1995) was programmed using PsyScope software (Cohen et al., 1993). Participants were BLU-554 biological activity informed that they would be playing a game with three online players connected from different study sites, and that there would be two types of players: `investors’ and `trustees’. Investors were described as those who make an initial investment decision, and trustees as those who make a final reallocation decision back to the investor. Participants were told that they were `randomly assigned’ to the role of investor or trustee; however, all(warmth) can activate or prime psychological coldness (warmth). Co.Ses related to interpersonal trust, with a particular focus on the insula. Areas of the insular cortex play a central role in processing of both thermal perception (Davis et al., 1998, 2004; Gelnar et al., 1999; Craig et al., 2000; Sawamoto et al., 2000; Brooks ?et al., 2002; Maihofner et al., 2002; Moulton, 2005) and trust information (Winston et al., 2002; Sanfey et al., 2003; Preuschoff et al., 2006, 2008; Rilling et al., 2008; Rolls et al., 2008; Todorov et al., 2008). This dual role led Williams and Bargh (2008) to suggest that the insula may be one route through which physical experiences with cold?The Author (2010). Published by Oxford University Press. For Permissions, please email: [email protected] (2011)Y Kang et al. . STUDY 1: EFFECTS OF TEMPERATURE ON TRUST BEHAVIOR Participants touched either a cold or a warm pack, and then played an economic trust game. We predicted and found that experience of physical cold (vs warm) decreases the amount of money invested in subsequent trust decisions. Methods Participants Thirty students (mean age ?19.7, s.d. ?2.6) provided written consent prior to participation according to the Declaration of Helsinki (BMJ 1991; 302: 1194), as approved by the Yale Institutional Review Board. All participants received either a course credit or cash ( 5) as compensation. Procedure An experimenter briefly explained that this study would involve two separate tasks: a consumer product evaluation and an online game. Then participants played five practice trials of the trust game before the temperature manipulation. Temperature manipulation. Participants were randomly assigned to either a cold or warm condition. The experimenter did not know the participants’ test conditions until just before the temperature task. To further minimize the chances that participants would become aware of the experimental hypotheses, a cover story was used to distinguish the temperature priming from the subsequent trust game tasks. Participants were told that, `We would like you to rate a specific consumer product. The product you will be rating is a therapeutic pack. Please hold the pack for 10 s and answer the following questions.’ We used temperature packs (260 ?370 ?10 mm, MD Prime Co., Korea) that were prepared to be 158C (average) for the cold condition and 418C (average) for the warm condition, respectively (following Davis et al., 1998). The experimenter placed the pack on each participant’s left palm; after 10 s, the participant completed a consumer questionnaire with the pack still resting on their palm. The questionnaire consisted of three items: (i) pleasantness of the pack (1 ?very unpleasant; 7 ?very pleasant); (ii) effectiveness of the pack (1 ?very effective; 7 ?not effective at all); and (iii) whether they would recommend it to their friends (yes/no). Trust game. A version of a behavioral trust game (Berg et al., 1995) was programmed using PsyScope software (Cohen et al., 1993). Participants were informed that they would be playing a game with three online players connected from different study sites, and that there would be two types of players: `investors’ and `trustees’. Investors were described as those who make an initial investment decision, and trustees as those who make a final reallocation decision back to the investor. Participants were told that they were `randomly assigned’ to the role of investor or trustee; however, all(warmth) can activate or prime psychological coldness (warmth). Co.
