Working memory period: the endurance of mental representations.

Working memory span assesses the maximum number of items that can be remembered in the face of concurrent processing. Models of working memory differ on several dimensions, yet many rely exclusively on this span procedure for their evidence. Three experiments consider an alternative paradigm that attempts to capture the endurance limits for remembering a fixed number of items during concurrent processing. Eight-year-old children performed two versions of this working memory period measure--operation period and reading period. Period scores show healthy test-retest reliability and external validity for scholastic attainment, comparing well with span scores in these respects. In addition, period is highly correlated with span and shows similar effects of varying the order in which stimuli are presented. We conclude that the durability of representations is an important factor in both span and period.     

Optimising daily diary questionnaires about fatigue,psychological flexibility and well-being: perspectives of people with rheumatic disease

Objectives: The aim of this study was to understand the perspectives of people with rheumatic disease have about completing a pilot daily diary questionnaire on fatigue and well-being, with the objective of incorporating these perspectives into future daily studies.

Methods: Twenty-two participants with experience of rheumatic disease-related fatigue attended a focus group and/or an individual interview. Before the focus group or interview, participants completed a one-off quantitative diary about their fatigue and well-being that day. In the focus groups and interviews, participants were asked about their experience completing the questionnaire. Data were analysed using inductive thematic analysis.

Results: Three themes were identified. ‘Concerns about Misinterpretation and Ambiguity’ addressed the elements of the diary questionnaire that were confusing or unclear to participants. ‘Desire to Provide Useful and Accurate Information’ outlined participants’ uncertainty about how to report complex daily experiences. ‘Gaining Personal Insight through Diaries’ revealed the personal benefits participants gained, particularly the development of insight into their fatigue.

Conclusions: People with rheumatic disease are willing to complete a daily diary questionnaire, but emphasise it is important for diary questionnaires to have clear instructions, questionnaire items and response scales. Addressing these concerns will ensure the reliability and validity of quantitative diary data.