In laboratory visual search experiments, distractors are often statistically independent of each other. However, stimuli in more naturalistic settings are often correlated and rarely independent. Here, we examine whether human observers take stimulus correlations into account in orientation target detection. We find that they do, although probably not optimally. In particular, it seems that low distractor correlations are overestimated. Our results might contribute to bridging the gap between artificial and natural visual search tasks.

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Background: Hypertension is a non-communicable disease and one of the most prominent modifiable risk factors for cardiovascular diseases. 7.6 million premature deaths are attributed to high blood pressure around the world. Better adherence with antihypertensive medications improves quality and length of life. This research focuses on the extent of adherence towards prescribed antihypertensive treatment, and identify factors influencing non-adherence.Methods: Descriptive cross-sectional study design was undertaken in various health care centers (2 primary health care center and 3 hospitals) of Nepal. A total of 348 individuals (age above 30) who suffered from hypertension visiting health institutes were included in the study. Adherence was calculated using Morisky Medication Adherence scale.Results: Adherence level to the antihypertensive medication as per the morisky adherence scale, 38.8% had medium level of adherence, 37.4% had a low adherence level, and 23.9% had a high adherence level among 348 participants. From the total participants, 89 admitted to be irregular in medication use. 56% of them claimed to do so because of forgetfulness, 12.4 % because of consistent exercise and low-salt diet, 10.1% due to the lack of affordability.Conclusions: Our study had concluded that the majority of participants had medium to low levels of adherence to anti-hypertensive drugs. Forgetfulness was major cause for irregular medication. Patient education and counseling, family support also seem to be important for proper adherence to drugs. Thus, health care providers should allocate ample time in educating, counseling clients and family.Keywords: Adherence; hypertension; medication; patients

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The attitude of students from lower-income and lower-middle-income towards importance of OSH is negative. This attitude could be changed by recommending modifications to OSH courses that reflect the importance of OSH. Since paramedical students showed more interest in OSH than medical students, modifications in existing health care system with major role of paramedics in OSH service delivery is recommended.