For TMAXIHO AND MAXIHO; The effect is basically dependent on the difference of the two values. The greater the difference the greater is the no of consecutive intra cell handovers allowed before consecutive handovers are inhibited.
Increasing TINIT on the otherhand increases the time wherein locating is disallowed after mobile changed channel. This will somehow control pingpong intracell handover if properly set.
I suggest if your network do have test BTS try adjusting these parameters for you to experience the actual effect..or you can also collect stats after you set some intracell handover parameters before and after and see difference.