That's the question psychologists hope to answer as the group progresses through high school.

Each peer group progresses through different steps of the program.

Beginning with minor bombings, these groups eventually progressed to kidnapings and hijackings.

The farther the group progressed, the more barbaric and the more sumptuous became the decorations.

Shocking because this group of players has not progressed one bit in this tournament.

The group was a success among its peers and progressed into cabaret and rock 'n' roll.

Then the entire group progressed on to the store, yelling and wailing.

From the first song to the last the group grows and progresses and the music reflects that.

Another group progressed to the more time consuming advanced companion crop fields method of gardening.

The group of girls and group of guys then progress into a clap-themed dance-off.