Template-type: ReDIF-Paper 1.0 Author-Name: Borghans, Lex Author-Email: lex.borghans@maastrichtuniversity.nl Author-Workplace-Name: Department of Economics and Research Centre for Education and the Labour Market, Maastricht University Author-Name: Meijers, Huub Author-Email: huub.meijers@maastrichtuniversity.nl Author-Workplace-Name: UNU-MERIT/MGSoG and Department of Economics, Maastricht University Author-Name: Weel, Bas ter Author-Email: b.ter.weel@cpb.nl Author-Workplace-Name: CPB Netherlands Bureau for Economic Policy Research and Department of Economics, Maastricht University Title: The importance of intrinsic and extrinsic motivation for measuring IQ Abstract: This research provides an economic model of the way people behave during an IQ test. We distinguish a technology that describes how time investment improves performance from preferences that determine how much time people invest in each question. We disentangle these two elements empirically using data from a laboratory experiment. The main findings are that both intrinsic (questions that people like to work on) and extrinsic motivation (incentive payments) increase time investments and as a result performance. The presence of incentive payments seems to be more important than the size of the reward. Intrinsic and extrinsic motivations turn out to be complements. Classification-JEL: J20, J24 Keywords: incentives, cognitive test scores Series: UNU-MERIT Working Papers Creation-Date: 2013 Number: 006 File-URL: http://www.merit.unu.edu/publications/wppdf/2013/wp2013-006.pdf File-Format: application/pdf File-Size: 275 Kb Handle: RePEc:unm:unumer:2013006