what effect did kanye west used ?

this link http://www.youtube.com/watch?v=t5Sd5c4o9UM
at 0:46 what effect did kanye used ? and 0:48 ? and 1:41 when she
says k k kiss me ( iknow to do it by cutting it and pasteing it
but it doesnt work ) and 3:00 what reverb is that i think its an
echo :/
and 3:40 i think its pitch bender right ?
please write the effects that u knw
please help me thanx (:
0:46
0:48
1:41
3:00