Marks and Nesse investigated evolutionary causes of anxiety disorders and reported about embarrassment in particular:
Social threats evoke responses that promote group acceptance, for
example, submission to dominants and to norms of dress, mien, odor,
speech, customs, beliefs. This prevents dangerous extrusion from the
group. Mild shyness and ...
There are quite a few studies on this, but a nice recent one is this:
Lee, Taraz G., et al. "Limiting motor skill knowledge via incidental training protects against choking under pressure." Psychonomic bulletin & review 26.1 (2019): 279-290.
They consider a few possible mechanisms, but end ...
Free recall refers to not being given exemplars during the retrieval task. For example, multiple choice would be called recognition here, not recall. The format of the presentation such as simultaneous vs. serial, or format of the recall in terms of ordering or grouping, would not affect the term free recall.
Memory recall is generally tested with one of three paradigms: serial, cued, and free. In serial recall the subject must recall the items in a specified order (e.g., forward or backwards). In cued recall, the items are usually presented in pairs and the subject is told to recall the matching item to one half of the pair. In free recall, subjects can repeat ...
Lucid dreaming is a half-way state between normal REM sleep and wakefulness. Lucid dreaming probably has less of a recuperative effect than normal REM sleep. On the other hand, there is usually less sleep inertia when waking from a lucid dream than when waking from a non-lucid dream.
The function of REM sleep is still a mystery, so very little is known ...
I think the answer is pretty easy: stress. As Wikipedia states it,
When people think the demands being placed on them exceed their ability to cope, they then perceive stress.
The player might feel that the expectations of them are too high and also if they fail, that the negative consequences will be big in terms of being blamed etc.
This stress ...