Difficulty
Experience
Phone interview: 29%
One on one interview: 26%
Group panel interview: 16%
IQ intelligence test: 6%
Background check: 6%
Skills test: 6%
Drug test: 6%
Personality test: 3%
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Application
I applied through an employee referral. The process took 2 weeks. I interviewed at ADP (Allentown, PA) in Jul 2010