In 1974, working with
Graham Hitch, Baddeley developed an influential model of
working memory called
Baddeley's model of working memory, which argues for the existence of multiple short-term memory stores and a separate interacting system for manipulating the content of these stores. There are three components of this model: the phonological loop, the central executive, and the visuospatial sketch pad. The model accounts for much of the empirical data on short-term retention and manipulation of information. His landmark study in 1975 on the capacity of short-term memory showed that people remembered more short words than long words in a recall test. This was called the word length effect and it demonstrated that pronunciation time rather than number of items determines the capacity of verbal short-term memory. This study also found that when participants repeated an irrelevant sound while reading the words, the word length effect does not happen. They studied patients with temporal lobe damage that caused memory problems. Results of such studies provide evidence that short-term and long-term memory are not one system. The amnesia patients had normal short-term memory but impaired long-term memory. Baddeley has also done research studies using divers and various underwater conditions. He studied the effects of depth and pressure on dexterity, the impact of temperature on response time, and
context-dependent memory on land and underwater. Baddeley was the director of the
Cognition and Brain Sciences Unit, a branch of the
UK Medical Research Council, based in
Cambridge, from 1974 - 1997. He was elected a
Fellow of the Royal Society in 1993 and in 1996, was elected a Foreign Honorary Member of the
American Academy of Arts and Sciences. In 2001, Baddeley received the
American Psychological Association (APA) Award for Distinguished Scientific Contributions. Baddeley was given the Lifetime Achievement Award by the
British Psychological Society in 2012. He also received the Major Advancement in Psychological Science Prize from the
International Union of Psychological Science in 2016.
Other notable works Baddeley has also part authored a number of
neuropsychological tests including the
Doors and People, Children's Test of
Nonword Repetition (CN REP), the Rivermead Behavioural Memory Test (RBMT), Autobiographical Memory Interview (AMI), Visual Patterns Test (VPT) and the Speed and Capacity of Language Processing Test (SCOLP). Baddeley was involved in the design of
United Kingdom postcodes, and was one of the founders of the
European Society for Cognitive Psychology. ==References==