Italian standardization of the dynamic version of the Logical Operations and Conservation test (LOC-DV)

In the present paper we propose a standardization of the dynamic version of the LOC test (Logical Operations and Conservation) elaborated by Vianello and Marin (1997). The dynamic assessment, compared with the traditional assessment, provides us with more information about the development of logical thinking, because it also measures potential abilities that can be perfected and will consolidate if the person is placed in optimal learning conditions. The LOC-DV test, standardized on a sample of 550 Italian children with typical development ages between 4 and 8 years (110 per age; 280 males and 270 females), results a highly reliable instrument (r = .91; split-half). The high regression coefficient (.85) between participants' scores and age guarantees a satisfactory progression of the developmental score parallel to the growth of age. The comparison between males and females performance reveals the absence of any significant differences. We present also the conversion tables of scores in mental age, deviation IQ and ratio IQ, giving reasons for the opportunity to prefer, in the age of development, at least at a clinical level, the utilization of the mental age and of IQ ratio rather than the deviation IQ.