In the field of psychology, particularly behavioral health research, there has been a resounding interest in the structure and measurement of what the psychological community calls affect. Affect refers to how we, as humans, “experience emotion” and can be broken down into two dominant dimensions of affective state, positive affect and negative affect (Hogg, Abrams and Martin, 2010) (Watson, Clark and Tellegen, 1988). According to Watson, Clark, and Tellegen (1988), positive affect (PA) refers to a person's enthusiasm and activity and negative affect (NA) refers to a general dimension of distress and discontent. Tellegen (1985) asserts that not only do these terms refer to the affective state, but also to the affective trait dimensions, stating that "the PA and NA traits roughly correspond to the personality factors of extraversion and neuroticism", respectively. Although numerous PA and NA scales were developed, however, these scales failed to develop items for PA and NA that were statistically independent of each other. In an attempt to operationalize the orthogonal dimensions of positive and negative affect, Watson, Clark & ​​and Tellegen (1988) developed the Positive and Negative Affect Schedule (i.e., PANAS). In the following review, I will evaluate and critique the PANAS, as a trait effect measure, focusing on the reliability and validity of the scores, the content of the tests, and how it is used. The PANAS is one of the most widely used. effective measures on the ground. The program includes 20 items, 10 for the Positive Affect (PA) scale (e.g., interested, excited) and 10 for the Negative Affect (NA) scale (e.g., distressed, upset) (Watson, Clark, & Tellegen , 1988). Each item rated by the participant is based on a...... middle of paper ......(8), 1343-1360. doi:10.1016/S0191-8869(02)00017-XHogg, MA, Abrams, D., and Martin, GN (2010). Social cognition and attitudes. In Martin, GN, Carlson, NR, Buskist W., (Ed.), Psychology (pp 646-677). Harlow: Pearson Education Limited. Said, H., Badru, BB and Shahid, M. (2011). Confirmatory factor analysis (CFA) for testing the validity and reliability of instruments in the study of education. Australian Journal of Basic and Applied Sciences, 5(12), 1098-1103. Retrieved April 24, 2014. Watson, D. and Tellegen, A. (1985). Towards a consensual structure of mood. Psychological Bulletin, 98(2), 219-235. doi:10.1037/0033-2909.98.2.219Watson, D., Clark, L.A., & Tellegen, A. (1988). Development and validation of brief measures of positive and negative affect: The PANAS scales. Journal of Personality and Social Psychology, 54(6), 1063-1070. do I: 10.1037/0022-3514.54.6.1063