An individual's experience of training and developement is often
affected by factors which the trainer cannot control. Discuss.
I need a document that I can use it to write the above essay?

What does HRT stand for?

Presumably either Hormone Replacement Therapy or Human Resource Management.

HRT stand for Human Resources and Training

The trainer has some control if the trainer is aware of the problems,
but in a large class the trainer can spend so much time on individual
problems, and small talk, that very little gets taught to anyone. The
trainer should not assume the learners know the defintions of words he
or she uses such as HRT and quantum effects. The trainer should be
convincing that the listeners will need this information later, if not
short term.
 So some barriers to learning are the trainer allows the class to
control the discussuion, gives some wrong information destroying his
credibility, noisy room, too hot, too drafty. The listeners are bored,
hungry, tired, not convinced the information is useful. The trainers
loudness, diction, sentence structure, accent, organization of the
subject is poor, resulting listener exhaustion trying to figure out
the details of the presentation.
 In my opinion, a few good examples is much better than a lot of
generalities.   Neil