Regional Jet 700 ER/LR (CRJ700)
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Confusion
Conflict Airborne Conflict; Deviation - Altitude Overshoot; Deviation - Altitude Excursion From Assigned Altitude
Flight Crew Returned To Clearance
Human Factors
We were climbing on autopilot to an assigned altitude of 22;000' and received an advisory from ATC that there was another aircraft descending to 23;000'. As the autopilot was leveling off the aircraft at 22;000' we got an RA of adjust vertical speed. My First Officer (FO) Pilot Flying (PF) disengaged the autopilot but instead of leveling the aircraft he climbed; flying into to the RA. I immediately took control of the aircraft but we ended up climbing approximately 300' before I was able to return the aircraft to 22;000'. ATC did not mention the deviation. I had to explain to my FO the way a RA works; apparently he misidentified the red 'do not climb' area of the VSI as the green 'safe' arc. Also; at the time; it took me a second to understand what was happening: having someone fly into an RA was something I absolutely didn't expect and took me completely by surprise.
CRJ-700 Captain reported getting a RA and then the First Officer overshot assigned altitude; climbing into the RA.