Items generated from the investigators recent qualitative study will be combined with items from existing literature and with novel image-based metrics to draft comprehensive measures of women's mammography experiences. Questionnaires will capture 1. relevant modifiable potential determinants of overall quality of experience, such as the mammographer's ability to put the client at ease, 2. key potential confounding variables (e.g. client physical characteristics such as mobility problems or breast tenderness), and 3. outcome variables representing or postulated to contribute to overall quality of experience, including pain from the mammogram. Questionnaire development will follow established methods, including testing for face and content validity with a sample of field experts and of the target population, and checking for question design errors - such as leading questions - by a member of the team experienced in questionnaire construction. The draft questionnaires will be cognitively tested for understandability and acceptability with a small sample of women eligible for breast screening, and refined before administration to a larger sample of women attending for screening mammography. The questionnaire data will be incorporated into a statistical analysis model along with additional data which the investigators will extract from participants' mammographic images as follows.