Methods: A total of 20 healthy men (19-29 yr) participated in a laboratory study. 13 of them attended a sleep restriction (SR) condition including a baseline (BL) day (8 h in bed per night), five SR days (4 h in bed), and two recovery (RC) days (8 h in bed). Seven controls slept 7-8 h each night. Each participant had two 50 min multitask sessions daily. After an extensive training phase task difficulty was set individually. Before and after each task session the participants estimated their performance (% of all available scores). Results: Both performance and subjective performance estimates were affected by the group-by-day interaction effect (p<.001). In the SR group, these outcomes were at a lower level during the last three SR days than during the BL day (p<.01). In addition, the SR affected selectively the pre-task performance estimates and actual performance: the pre-task estimates decreased less than actual performance during the last two SR days (p<.05). The recovery days restored both the subjective performance estimates and actual performance to their baseline levels. In the control group, neither performance nor the subjective performance estimates showed a decrease over the experimental days. Conclusions: Cumulative sleep restriction makes one to prospectively underestimate the actual degree of cognitive impairment. This metacognitive effect of sleep restriction may play a role in an increased accident risk in shift work. Recovery sleep after sleep restriction seems to restore the relationship between subjective performance estimates and actual performance to its baseline level. Breast cancer screening uptake is lower in ethnic minority women compared to white women. In particular South Asian women are less respondent to invitations for screening but also have higher breast cancer risk. This study looked at beliefs about breast cancer awareness in South Asian Muslim women pre-mammography age (29-49 years).