If you assume that Marcus must have been in a good mood because he helped Juanita pick up some books she dropped, according to attribution theory, his attribution is internal and unstable.
An internal attribution occurs when someone assigns some personal reason to justify an external event, rather than regarding the event as an environmental attribution.
- Like for example the belief that Marcus was in a good mood because of an external event.
The attribution is also unstable in that it assumes that a behavior is due to a temporary and unstable factor, meaning Marcus' good mood can change over time.
Therefore, the attribution given to Marcus is internal and unstable.
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