DISCUSSION Tosummarizethefindings: • Subjects who customized the DSS agreed more with the recommendationsofaDSS,bothinabinary”yes/no”type decision and in a more continuous ”how much” decision, even though their customization had no actual impact on therecommendations.
• This bias led to much worse decisions whenthe DSS gavea poorqualityrecommendation,andslightlybetterdecisions whentheDSSgaveagoodrecommendation.
• CustomizingtheDSSdidnotleadsubjectstobemorecon- fidentintheirdecisions.
• Theillusionofcontrol,ForereffectandIKEAeffectdonot explainthiscustomizationbias.
• Confirmation bias is the best explanation for the bias from these data. Subjects were highly likely to agree with the