Massed but not spaced training impairs spatial memory

S Commins, L Cunningham, D Harvey… - Behavioural brain …, 2003 - Elsevier
S Commins, L Cunningham, D Harvey, D Walsh
Behavioural brain research, 2003Elsevier
The Morris water maze and the object displacement task are two popular tools used to
investigate spatial learning and memory. Research has focused mainly on the acquisition of
spatial tasks while little attention has been given to the retention phase. We examined the
effects of different training procedures on retention of the water maze and also reactivity to
spatial change in the object displacement task 7 days post-acquisition. We found that
massed-trained animals were impaired on retention of the water maze compared to those …
The Morris water maze and the object displacement task are two popular tools used to investigate spatial learning and memory. Research has focused mainly on the acquisition of spatial tasks while little attention has been given to the retention phase. We examined the effects of different training procedures on retention of the water maze and also reactivity to spatial change in the object displacement task 7 days post-acquisition. We found that massed-trained animals were impaired on retention of the water maze compared to those animals that had received spaced-training. We also found that the massed-trained animals habituated readily to their environment in the object displacement task while the spaced-trained group did not. Furthermore the massed-trained group did not react to spatial change 7 days post-habituation compared to the increased reactivity displayed by the spaced-trained group. Results are discussed in terms of poor encoding of the environment leading to poor retention.
Elsevier