... The observations by Deane J and McHugh J are just that - observations. They have never been given authoritative force either from the High Court or from any intermediate court of criminal appeal.
Their Honours' observations are based on assumptions about child psychology which are widely held but which are not necessarily well founded. Many judges share a conventional wisdom about human behaviour, which may represent the limitations of their background. This has been shown to be so in sexual assault cases. (See R v Johnston (1998) 45 NSWLR 362 at 367-368.)
Legislative intervention was required to overcome the tendency of male judges to treat sexual assault complainants as prone to be unreliable. The observations of Deane J and McHugh J in Longman reflect a similar legal tradition that treated children as unreliable witnesses. In the past both categories of witnesses required corroboration.
Jurors may also reflect these widely held assumptions about children, as they may also do about sexual assault complainants. Such prejudices may be reinforced by the profession and the bench in the conduct of a criminal case. (See Quas JA et al 'Do Jurors "Know" What Isn't So about Child Witnesses?' (2005) 29 Law and Human Behaviour 425.)
There is a significant debate as to whether expert evidence should be admissible about the ability of children to give accurate evidence, especially in child sexual assault proceedings. See, most recently, Uniform Evidence Laws Report ALRC Report 102, NSWLRC Report 112, VLRC Final Report, December 2005 at 9.138-9.158; Criminal Justice Sexual Offences Task Force, Responding to Sexual Assault, Final Report, Sydney, December 2005, pp 165-176. These two recent reports refer to a range of earlier studies and reports. They also outline the legislation that already exists in some jurisdictions to permit such evidence and make recommendations for further legislative intervention.
There is a substantial body of psychological research indicating that children, even very young children, give reliable evidence. (See eg the references in Ligertwood Australian Evidence (4th ed) LexisNexis Butterworths, Australia, 2004 para 7.31 fn 10 and 11.) These are complex issues, as reflected in reviews of the research on the ability of young children to distinguish fantasy from reality (see Woolley JD 'Thinking About Fantasy: Are Children Fundamentally Different Thinkers and Believers from Adults' (1997) 68 Child Development 991; Taylor M 'The Role of Creative Control and Culture in Children's Fantasy/Reality Judgments' (1997) 68 Child Development 1015; Sharon T and Woolley JD 'Do Monsters Dream? Young Children's Understanding of the Fantasy/Reality Distinction' (2004) 24 British Journal of Developmental Psychology 293 at 294-296). The same is true of research about a child's ability to accurately recall stressful events (see McNally RJ, Remembering Trauma, Harvard Uni P, Cambridge Mass 2003 at pp 58-62).
The complexity of these issues is not reflected in the observations of Deane J and McHugh J in Longman, which should, accordingly, be treated with caution. [2] - [8]