Sports psychologists (aka. Assistant coaches?)
These are multipurpose specialists - they can also be equated to 'assistant coaches' when you consider their impacts upon secondaries.
They will help with your teams morale, keeping it up even when you are losing.
They are also used in conjunction with the bowling, batting and fielding coaches to help improve the concentration and consistency of your players being trained.
Every sports psychologist you hire attends every net where a player can receive training in concentration and/or consistency.
Training secondaries
Psychologists work with the bowling, batting and fielding coaches to help improve the concentration and consistency of your players being trained.
Your psychologists will attend all but the fitness coaching sessions, and will be passing on helpful hints to the players while they are being coached.
While employing these specialists will help your team with any morale issues you may be experiencing, they can also help your players with the more mental skills: concentration and consistency. Your psychologists will attend all but the fitness coaching sessions, and will be passing on helpful hints to the players while they are being coached. The more psychologists you have, the more advice can be dished out, although the law of diminishing returns does apply here too with each additional psychologist providing fewer words of wisdom than the one before.
Sports psychologists will only attend the first net of a type per player per day. So your bowling trainee with 3 bowling nets only sees the sports psychologists in the first net and the sports psychologists are not available to him in the subsequent bowling nets. If he had a fielding net as well, they would also attend that session. All psychologists will attend each net for which any would qualify, so have 10 different players being trained one session of batting each and all psychologists will attend all 10 sessions.