A meta$-$analysis by Arthur et al$.(2003)$ on training methods found that:

Select one:

a$.$ training effectiveness does not seem to vary as a function of the training method.

b$.$ lectures were the favorite method of trainees.

c$.$ lectures were quite effective as a method for teaching declarative knowledge.

d$.$ lectures were only effective as a training method if they incorporated Powerpoint.

e$.$ lectures were overall an ineffective training method.