We do not know whether such variations are the result of internal causes or of external ones.

Winners were more likely than losers to attribute the match outcome to internal causes.

The strange duration of this search has internal and external causes.

Unfortunately for us, internal and external causes do not always co-operate.

That is, it has a very weak internal cause and a very marked external one.

People who score high on this dimension are likely to attribute the consequences of their behaviors to internal causes.

Thus, there is nothing to be gained from searching for internal causes, either psychological or physical.

As a matter of interest would you say that the difference in the experience has an internal or external cause?

He also was the first to dwell on the internal causes of illnesses.

And that, of course, may be decided by various causes, internal and external.