The psychometrics of photographic cropping: the influence of colour, meaning, and expertise.

Cropping is the central act of photography, the viewfinder of a camera being used to crop a portion of the visual world which is then surrounded with a frame. Six studies are described which show that the act of cropping is carried out reliably and confidently by both expert and non-expert participants. Two studies confirm that some croppers are better croppers than others, their cropped images being preferred aesthetically over the croppings of less-good croppers.

Viscosimetric effect of fibrinogen.

Aims: To investigate the correlation between fibrinogen concentration and plasma and serum viscosity.

Methods: Measurements of paired plasma viscosity and serum viscosity were compared in 45 subjects with a considerable range of fibrinogen concentrations and serum viscosity.

Results: Plasma and serum viscosity correlated well with plasma fibrinogen in cases of normal serum viscosity, but not in cases of myeloma or macroglobulinaemia.