Context. In 2009, the Sun and the Earth passed through the equatorial plane of Jupiter and therefore the orbital planes of its main satellites. It was the equinox on Jupiter. This occurrence made mutual occultations and eclipses between the satellites possible. Experience has shown that the observations of such events provide accurate astrometric data able to bring new information on the dynamics of the Galilean satellites. Observations are made under the form of photometric measurements, but need to be made through the organization of a worldwide observation campaign maximizing the number and the quality of the data obtained.
Two hundred and twenty-three people completed either only the Structural Profile Inventory (SPI) Lazarus, 1989) or both the SPI and the Vocational Preference Inventory (VPI) (Holland, 1966, 1985). Correlations were computed among the scales of these two instruments, demonstrating concurrent validity for five of the SPI scales. A factor analysis was computed demonstrating the factor validity of the SPI and Cronbach's alpha was computed for each of the seven scales of the SPI, demonstrating internal consistency. The results of this study demonstrate that the SPI is a valid and reliable instrument.
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