Pictures and film clips are widely used and accepted stimuli to elicit emotions. Based on theoretical arguments it is often assumed that the emotional effects of films exceed those of pictures, but to date this assumption has not been investigated directly. The aim of the present study was to compare pictures and films in terms of their capacity to induce emotions verified by means of explicit measures. Stimuli were (a) single pictures presented for 6 s, (b) a set of three consecutive pictures with emotionally congruent contents presented for 2 s each, (c) short film clips with a duration of 6 s. A total of 144 participants rated their emotion and arousal states following stimulus presentation. Repeated-measures ANOVAs revealed that the film clips and 3-picture version were as effective as the classical 1-picture method to elicit positive emotions, however, modulation toward positive valence was little. Modulation toward negative valence was more effective in general. Film clips were less effective than pictorial stimuli in producing the corresponding emotion states (all p < 0.001) and were less arousing (all p ≤ 0.02). Possible reasons for these unexpected results are discussed.
Polonium chemistry /Chemistry at extremely low concentrations / J "Po
AbstractThe 3.05 min 2 "Po was used to investigate the chemical behaviour of polonium at a level of 5000 to 40 atoms per experiment in three fast separation procedures, the electrochemical deposition on silver, the coprecipitation with elementary tellurium and the coprecipitation with arsenic sulphide. Complete recovery was found in the whole concentration range studied in all three systems.
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