Spielberger state-trait anxiety inventory (STAI)
anxiety
This questionnaire was developed by Spielberger et al. (1970) and revised in 1980. The Spielberger anxiety inventory, also known as STAI, includes separate self-measurement scales to measure state anxiety (STAI-y1) and trait anxiety (STAI-y2). This questionnaire has 40 items. Items 1 to 20 include state anxiety with four options (very low, low, high, very high) and items 21 to 40 trait anxiety with four options (rarely, sometimes, often, almost always). This scale has no time limitations. Each STAI item is valued from 1 to 4 based on the answer provided. Higher scores indicate more anxiety symptoms. The reliability coefficient for items 1 to 20 was 0.889; it was 0.864 for items 21 to 40. Reliability in the state and trait anxiety scale based on Cronbach’s alpha was 0.91 and 0.90, respectively [