Causal attributions of task difficulty and luck are internal,and causal attributions of ability and effort are external.

Causal Attributions

The process of trying to determine the causes of specific events, especially regarding understanding behaviors and outcomes in social settings.

Task Difficulty

The perceived level of challenge presented by a task, which can influence motivation and performance.

Internal

Relating to or situated on the inside, often referring to processes or aspects within an organization or individual.