Distinction between explicit (mediated/declarative) and implicit (unmediated) learning

Role of the hippocampus

Trace eyeblink conditioning

Eliminated by hippocampal lesions

Disrupted in patients with hippocampal damage (Clark & Squire)

Requires conscious mediation

Cognitive mediation in animals

A cognitive interpretation of the distinction between S-R and S-S learning

Evidence a CS evokes an image of the US (Holland)

Mediated acquisition

Mediated extinction

Conditional discriminations

Facilitation of CS-directed responding by a conditional cue

Evidence the conditional cue is not an excitor

Relation to to conditioned inhibition

Spatial learning in rats

Radial arm maze

Evidence for durable memory

Evidence they rely on spatial information

Morris water maze

Context conditioning

Hippocampal lesions disrupt context conditioning but not learning about an embedded cue

Hippocampal lesions a month after training do not affect context conditioning

Theories

Role of configural relations

Distinction between linearly separable and non-linearly separable problems

Rudy & Sutherland (1995)

Hippocampus: rapid, automatic, encoding of configural relations

Cortical mechanisms: slow, incremental, process

Only encodes configural relations if forced to by task demands