The International Affective Picture System (IAPS) is a database of pictures designed to provide a standardized set of pictures for studying emotion and attention[1] that has been widely used in psychological research.[2] The IAPS was developed by the National Institute of Mental Health Center for Emotion and Attention at the University of Florida. In 2005, the IAPS comprised 956 color photographs ranging from everyday objects and scenes − such as household furniture and landscapes − to extremely rare or exciting scenes − such as mutilated bodies and erotic nudes.
Normative Ratings
It is the essential property of the IAPS that the stimulus set is accompanied by a detailed list of average ratings of the emotions elicited by each picture. This shall enable other researchers to select stimuli eliciting a specific range of emotions for their experiments when using the IAPS. The process of establishing such average ratings for a stimulus set is also referred to as standardization by psychologists.
The normative rating procedure for the IAPS is based on the assumption that emotional assessments can be accounted for by the three dimensions of valence, arousal and dominance.[3] Thus, participants taking part in the studies that are conducted to standardize the IAPS are asked to rate how pleasant/unpleasant, how calm/excited and how controlled/in-control they felt when looking at each picture. A graphic rating scale, the Self-Assessment Manikin (SAM),[4] is used for this rating procedure.
Original norms
The official normative ratings for the IAPS pictures were obtained from a sample of 100 college students (50 women, 50 men, presumably predominantly US-American) who each rated 16 sets of 60 pictures. The rating was carried out in groups using paper-and-pencil versions of the SAMs. Pictures were presented for 6 seconds each; 15 seconds were given to rate the picture. /dominance.[1] Average valence, arousal and dominance ratings are available for the overall sample, men, and women.
Normative ratings were also obtained from children ages 7–9 years, 10-12, and 13-14. The rating procedure for children was mildly adapted; among other modifications, children were tested in classrooms, given instructions in a more child-friendly language, and they were allotted 20 seconds to rate each picture instead of 15.[1]
Norms from further studies
Researchers from institutes other than the National Institute of Mental Health have also conducted studies to establish normative ratings for the IAPS in languages other than English and cultures other than US-American culture including Hungarian,[5] German,[6] Portuguese,[7] Indian,[8] and Spanish.[9] One of these studies also included older participants (63–77 years).[6]
The IAPS has also been used in the psychology laboratory to experimentally manipulate anxiety and induce negative affect, enabling researchers to investigate the impacts of negative affect on cognitive performance.[16][17]
Access
To maintain novelty and efficacy of the stimulus set, the IAPS images themselves are typically not shown in any media outlet or publications. The IAPS may be received and used upon request by members of recognized, degree-granting, academic, not-for-profit research or educational institutions.[18]
Alternatives
Image sets
A group of researchers at Harvard University has published an alternative set of images that they claim to be comparable to the IAPS in 2016.[19] The OASIS image database consists of 900 images that have been rated on valence and arousal by a sample of US-Americans recruited via amazon mechanical Turk. As opposed to the IAPS, all OASIS images are in the public domain. A detailed description is provided on the first author's homepage.
Other alternative databases of photographic images of scenes with various kinds of affective content include:
The authors of the IAPS have developed a number of non-image alternatives for eliciting emotion such as the Affective Norms for English Words (ANEW)[31] and International Affective Digitized Sounds (IADS).[32]
References
^ abcLang, P.J., Bradley, M.M., & Cuthbert, B.N. (2008). International affective picture
System (IAPS): Affective ratings of pictures and instruction manual. Technical Report A-8. University of Florida, Gainesville, FL.
^Bradley, M. M. & Lang, P. J. (2007). The International Affective Picture System (IAPS) in the study of emotion and attention. In J. A. Coan and J. J. B. Allen (Eds.), Handbook of Emotion Elicitation and Assessment (pp. 29-46). Oxford University Press
^Osgood, Charles E.; Suci, George J.; Tannenbaum, Percy H. (1957). The measurement of meaning. Urbana: University of Illinois Press.
^Lang, P. J., Bradley, M. M., and Cuthbert, B. N. (1997). International affective picture system (IAPS): Technical manual and affective ratings.
^Deak, A.; Csenski, L.; Revesz, G. (2010). "Hungarian ratings for the International Affective Picture System (IAPS): A cross-cultural comparison". Empirical Text and Culture Research. 4: 90–101.
^Lohani, M.; Gupta, R.; Srinivasan, N. (2013). "Cross-Cultural Evaluation of the International Affective Picture System on an Indian Sample". Psychological Studies. 58 (3): 233–241. doi:10.1007/s12646-013-0196-8. S2CID143322053.
^Caria, A.; Sitaram, R.; Veit, R.; Begliomini, C.; Birbaumer, N. (2010). "Volitional control of anterior insula activity modulates the response to aversive stimuli. A real-time functional magnetic resonance imaging study". Biological Psychiatry. 68 (5): 425–32. doi:10.1016/j.biopsych.2010.04.020. PMID20570245. S2CID11086274.
^Styliadis, C.; Ioannides, A. A.; Bamidis, P. D.; Papadelis, C. (2015). "Distinct cerebellar lobules process arousal, valence and their interaction in parallel following a temporal hierarchy". NeuroImage. 110: 149–161. doi:10.1016/j.neuroimage.2015.02.006. PMID25665964. S2CID6472426.
^Bradley, M. M.; Codispoti, M.; Cuthbert, B. N.; Lang, P. J. (2001). "Emotion and motivation I: defensive and appetitive reactions in picture processing". Emotion. 1 (3): 276–298. doi:10.1037/1528-3542.1.3.276. PMID12934687.
^Baglioni, C.; Lombardo, C.; Bux, E.; Hansen, S.; Salveta, C.; Biello, S.; Espie, C. A. (2010). "Psychophysiological reactivity to sleep-related emotional stimuli in primary insomnia". Behaviour Research and Therapy. 48 (6): 467–475. doi:10.1016/j.brat.2010.01.008. PMID20227678.
^Ossowski, U.; Malinen, S.; Helton, W. S. (2011). "The effects of emotional stimuli on target detection: indirect and direct resource costs". Consciousness and Cognition. 20 (4): 1649–1658. doi:10.1016/j.concog.2011.08.015. PMID21978909. S2CID21433770.
^Bradley, Margaret M; Lang, Peter J. "IAPS request form". Retrieved 30 May 2015.
^Haberkamp, Anke; Glombiewski, Julia Anna; Schmidt, Filipp; Barke, Antonia (February 2017). "The DIsgust-RelaTed-Images (DIRTI) database: Validation of a novel standardized set of disgust pictures". Behaviour Research and Therapy. 89: 86–94. doi:10.1016/j.brat.2016.11.010. PMID27914317.
^Carretié, L.; Tapia, M.; López-Martín, S.; Albert, J. (1 July 2019). "EmoMadrid: An emotional pictures database for affect research". Motivation and Emotion. 43 (6): 929–939. doi:10.1007/s11031-019-09780-y. hdl:10486/709892. S2CID198616593.
^Bradley, M; Lang, P (1999). "The International affective digitized sounds (IADS): stimuli, instruction manual and affective ratings". {{cite journal}}: Cite journal requires |journal= (help)