कारक विश्लेषण (Factor analysis) में, दो कारकों को लंबकोणीय (orthogonal) तब कहा जाता है जब उनके बीच अलगाव का कोण होता है:

In a factor analysis, the communality values (h2) for five variables are 0.78, 0.42, 0.85, 0.60, and 0.52 respectively. Uniqueness is given by (1 - h2). Which of the following statements can be inferred? I. Variable 3 has the lowest uniqueness and Variable 2 has the highest uniqueness. II. Variable 3 has the highest communality. III. Other things remaining constant, Variable 3 will have the highest reliability. IV. Variable 2 has the highest uniqueness.

Which of the following are the key applications and characteristics of Factor Analysis? 1. To find causal relationships between variables2. Parsimonious way of summarizing a large number of correlated variables into fewer underlying dimensions3. To find common variance among variables4. Providing empirical support to trait theories of personality