What can the Forer effect or Barnum effect partly? — The Forer effect or Barnum effect can provide a partial explanation for the widespread acceptance of some beliefs and practices, such as astrology, fortune telling, graphology, and some types of personality tests.

Often we are faced with situations where our intuition misguides us. Cognitive biases are systematic patterns of deviation from norm or rationality in judgment. Many of these biases affect belief formation, business and economic decisions, and human behavior in general.