Critical Thinking
The art of analyzing and evaluating thinking with a view to improving it (Foundation for Critical Thinking).
Cronbach alpha
Cronbach's alpha is a measure used to assess the reliability, or internal consistency, of a set of scale or test items. In other words, the reliability of any given measurement refers to the extent to which it is a consistent measure of a concept, and Cronbach's alpha is one way of measuring the strength of that consistency. See more here: Virginia stat Consulting or here (Wikipedia).
Learning
The process whereby knowledge is created through the transformation of experience (Kolb, Experiential Learning; Experience as the Source of Learning and Development).
Stereotype Threat
The term refers to being at risk [given a specific set of contextual circumstances] of confirming a negative stereotype about one's social group as a self-characteristic [i.e., a personal trait]. For example, Let's say that you find yourself in a situation in which you realize that someone may have a steretotype about you [because of you physical appearance, gender or any other general characteristic of social group] and there is a part of you that is afraid that your [about to be undertaking] action and behavior will prove to that person that the stereotype is true. The concept was first introduced in seminal publication of Steele and Arsonson (1995) (see also ResearchGate link).