Age-of-acquisition (AoA) effects are such that early-acquired items are more quickly recognized and produced than later acquired items. In this laboratory analogue, participants were trained to name a group of Greeble pictures with a novel nonsense name. We manipulated order of acquisition of the stimuli: Half of the stimuli were presented from the onset of training (early acquired) whilst the other half were introduced later in the training schedule (late acquired). At test, when early and late stimuli had equal cumulative frequency, early stimuli were named significantly faster than late items. In a second test, it was also found that visual duration thresholds were significantly smaller for the early items when participants were asked to name the critical items. These findings support the notion that order-of-acquisition effects can be manifest over a short time span in the laboratory, and that the effect of order of acquisition is distinct from mere frequency of exposure. The findings are consistent with the idea that AoA effects occurring over a large temporal scale may be a special case of more general order-of-acquisition effects, and both may be a general property of learning mechanisms.

Aim: To conduct a local evaluation of the use of the educational resource: Suicide in Children and Young People: Tips for GPs, in practice and its impact on General Practitioners (GPs)’ clinical decision making. Background: This Royal College of General Practitioners (RCGP) resource was developed to support GPs in the assessment and management of suicide risk in young people. Method: The dissemination of the educational resource took place over a nine month period (February 2018–October 2018) across two Clinical Commissioning Groups in West Midlands. Subsequently, a survey questionnaire on GPs’ experiences of using the resource was sent to GPs in both Clinical Commissioning Groups (CCGs). Findings: Sixty-two GPs completed the survey: 21% reported that they had used the resource; most commonly for: (1) information; (2) assessing a young person; and (3) signposting themselves and young people to relevant resources. Five out of thirteen GPs (38.5%), who responded to the question about whether the resource had an impact on their clinical decision making, reported that it did; four (30.7%) responded that it did not; and four (30.7%) did not answer this question. Twenty out of thirty-two GPs (62.5%) agreed that suicide prevention training should be part of their NHS revalidation cycle. The generalizability of the findings is limited by the small sample size and possible response and social desirability bias. The survey questionnaire was not validated. Despite the limitations, this work can be useful in informing a future large-scale evaluation of the RCGP online resource to identify barriers and facilitators to its implementation.

Age of acquisition (AoA) refers to the age at which people learn a particular item and the AoA effect refers to the phenomenon that early-acquired items are processed more quickly and accurately than those acquired later. Over several decades, the AoA effect has been investigated using neuroscientific, behavioural, corpus and computational techniques. We review the current evidence for the AoA effect stemming from a range of methodologies and paradigms, and apply these findings to current explanations of how and where the AoA effect occurs. We conclude that the AoA effect can be found both in the connections between levels of representations and within these representations themselves, and that the effect itself occurs through the process of the distinct coding of early and late items, together with the nature of the connections between levels of representation. This approach strongly suggests that the AoA effect results from the construction of perceptual-semantic representations and the mappings between representations.

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