Shares of Aristocrat Leisure (ASX:ALL) inched up 0.3% in recent trading on Wednesday after a Federal Court Judge on Tuesday rejected questions proposed by the firm for plaintiffs during a class action lawsuit proceedings, saying that the questions were "not straightforward and require, in some cases, self-diagnosis of a clinical gaming disorder."

While the respondents and the applicants in the lawsuit agreed that orders should be made for the approval and distribution of notices that would advise group members of their right to opt out of the proceeding, Aristocrat wanted to include a questionnaire, which included questions seeking information about whether affected parties had been diagnosed "as suffering from a gambling disorder in accordance with the diagnostic criteria in DSM-5: Gambling Disorder."

The class action lawsuit alleged that the social casino games offered on apps by Aristocrat, and its units Product Madness and Big Fish Games, are prohibited interactive gambling services within the meaning of the Interactive Gambling Act.

The Federal Court of Australia Judge said that based on the information provided, he was satisfied that the respondents could reasonably estimate the aggregate value of group members' claims from their records.