For example, if a person gets promoted, it is because of his/her ability and competence whereas if he/she does not get promoted, it is because his/her manager does not like him/her (external, uncontrollable factor).
For example, if a person gets promoted, they may reason that it is because of his/her abilities and competence (internal, dispostional factors). However, if he/she does not get promoted, they believe it is because their manager does not like him/her (external, uncontrollable factor).