👉 Testiness is a concept in psychology that refers to an individual's tendency to be overly sensitive or defensive when facing criticism, particularly from others. It can manifest as a heightened awareness of one's own flaws and potential failings, leading individuals to question their abilities and confidence. Testiness can also be associated with a lack of self-esteem or a lack of confidence in oneself, which can lead to avoidance of challenging situations or negative feedback.