True and false memories in middle childhood: the relationship with cognitive functioning

This study was designed to investigate developmental changes in true and false memories and to detect links among them in middle childhood. Participants were 372 Italian children (from 6 to 11 years, 174 males) divided into two age groups. After hearing a story, children provided a free-recall and their true and false retrieved information was measured. Then children were repeatedly asked some true and misleading questions about the story and their cued-recall and interrogative suggestibility were measured. Finally, children again recalled the story to assess the post-event misinformation effect of the suggested information. Individual differences in fluid intelligence, working memory and executive functions were also assessed to investigate their relationships with true and false memories. Typical age effects were found in memory recall and interrogative suggestibility. Interesting links among true, spontaneous and suggested false memories were found. Finally, analyses did not reveal the existence of a relationship between suggestibility and cognitive functioning.     

Blood cyanide determination in two cases of fatal intoxication: comparison between headspace gas chromatography and a spectrophotometric method

Blood samples of two cases were analyzed preliminarily by a classical spectrophotometric method (VIS) and by an automated headspace gas chromatographic method with nitrogen-phosphorus detector (HS-GC/NPD). In the former, hydrogen cyanide (HCN) was quantitatively determined by measuring the absorbance of chromophores forming as a result of interaction with chloramine T. In the automated HS-GC/NPD method, blood was placed in a headspace vial, internal standard (acetonitrile) and acetic acid were then added. This resulted in cyanide being liberated as HCN. The spectrophotometric (VIS) and HS-GC/NPD methods were validated on postmortem blood samples fortified with potassium cyanide in the ranges 0.5-10 and 0.05-5 mug/mL, respectively. Detection limits were 0.2 mug/mL for VIS and 0.05 mug/mL for HS-GC/NPD. This work shows that results obtained by means of the two procedures were insignificantly different and that they compared favorably. They are suitable for rapid diagnosis of cyanide in postmortem cases.