P: Two-process model was definite step forward when it proposed in 1960 as it went beyond Watson & Raynor's simple concept of classical conditioning explanation of phobias.
E: It explained how phobias maintained over time & this important applications for therapies coz it explains why patients need to be exposed to feared stimulus to remain afraid.
E: Key implications for therapy. If patient prevented from practicing avoidance behaviour, behaviour ceases to be reinforced so declines.
L: This is strength since it shows the 2 process model has application to therapy.