Summary. Students' understanding of physical phenomena is determined by their relevant representations, which are very crucial for science education. Since these representations are often incompatible with the scientific view, their functional role in the learning processes has been the main interest of a plethora of research work over the last decades. In the present research students' representations for boiling and evaporation are investigated and an attempt is made to correlate them with two cognitive variables, which have been shown to be involved in mental processes of learning science, namely convergent and divergent thinking. The study took place with the participation of 375 sixth-grade elementary school pupils (aged 11-12). Methodologically the ordinal logistic regression was implemented to correlate the categorical-type dependent variable with scale-type independent predictors. The results show that both convergent and divergent thinking are significantly associated with pupils' sufficient responses. Interpretation of the results and implications for science education are discussed.

This study explores primary school pupils’ knowledge recall and interpretation skills regarding chemical and physical phenomena, in relation to three psychometric variables: logical thinking, field dependence/field independence, and divergent thinking. The participants (N = 375) were in the fifth and sixth grades (aged 11–12) taking an introductory course in science, and they were involved in three tasks related to combustion, dissolution, and mixture separation. The pupils had to complete an instrument, in which they were asked to describe and interpret the phenomena involved in the tasks. Two achievement variables were recorded separately, one relating to knowledge recall and the other to the interpretation of the phenomena. In addition, the participants completed the corresponding psychometric tests. Correlational and multiple linear regression analysis showed that the dependent measures were associated with the cognitive variables, while path and mediation analysis showed the direct and indirect effects of the neo-Piagetian constructs on the dimensions of knowledge and interpretations. The main implications of the findings are theoretical and concern the role of the operationalized mental resources in learning the specific subject matter. Moreover, the results inform teaching practices and curricula designs, and they point out the learning difficulties ascending from the individual differences under study. Further discussion on conceptual change is provided.

The present study investigated conceptual understanding in learning science in relation to four cognitive variables: logical thinking, field-dependence/field-independence, and divergent and convergent thinking. The participants were fifth- and sixth-grade elementary school pupils involved in different mental tasks, where they had to describe and interpret phenomena related to changes of matter. This brief report presents data from the students’ understanding of evaporation, and the method of analysis, a person-centered approach, is explicated. Latent class analysis (LCA) was applied to reveal distinct clusters of cases sharing similar patterns of responses. The use of LCA aligns with theoretical conjectures related to a stepwise conceptual change process, and the hypothetical steps correspond to the identified discrete latent classes (LCs). Subsequently, the LCs were associated with the four cognitive variables as covariates, thus providing empirical evidence for the role of the above-mentioned individual differences in children’s learning in sciences. Methodological issues and theoretical implications are discussed.