"The Trip" (1967) is so much better

Both films are very often mentionned together, but I think the Trip is a far Superior film than Psych-Out.

The Trip is a very deep tale about introspection and self awareness. It had the guts to try something new and Roger Corman created a experimental masterpiece with no plot, but a strong atmosphere.

Psych-Out is interesting for its great cast but is just a boring story about a random group of kids.