Selection tests fall into four main categories: cognitive abilities, motor and physical abilities, personality and interests, and achievement. Cognitive ability tests measure skills like reading comprehension, math, and mechanical reasoning. Motor and physical ability tests evaluate attributes like speed, dexterity, and endurance. Personality and interest tests assess traits such as extraversion, emotional stability, agreeableness, openness to experience, and conscientiousness. Achievement tests determine an applicant's knowledge in specific subjects.