Sheriff Richard Davidson deferred sentence until next month for a psychological report on Morton.
They said Singaporean investigators are seeking to review potential evidence from an external hard drive found in Mr. Todd's Singapore apartment, and a 2002 psychological report.
They asked participants to report on their own psychological health during that time to estimate the "green space effect".
BBC: Green spaces boosts wellbeing of urban dwellers - study
According to the American Psychological Association, one in three Americans report being extremely stressed.
More than half of women prisoners, according to Sir David's report, have severe emotional or psychological problems.
The report says unless the animals' health and psychological suffering can be addressed, the ethics of keeping elephants in zoos must be questioned.
Authorities are establishing a psychological trauma unit to provide support to children and school staff, local media report.
Doctors report that more than a third of the physical problems they encounter have some psychological basis.
The research team behind the report also published a follow-up paper in 2010, in the American Psychological Association's journal, saying there should be "public education" so parents and schools could address the issue.
The report's authors said therapeutic services to children should be provided to address the psychological harm of poor parenting.
But a report released by a zero-tolerance task force assembled and published by the American Psychological Association in 2008 concluded there was no evidence that these measures were effective in making students and staff feel safer.
Another report, this one from the health ministry, shows it badly needs cash to deal with the psychological effects.
Bad news for the makers of sleeping pills: A new report in the prestigious Journal of the American Medical Association says that a six-week course of psychological therapy may be more effective for insomnia than taking drugs.
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