by Gewar
In most cases, you have to search subtypes of cards (upper right corner, under the type of spell) - ie Pacify has subtype 'Psychic':http://www.cardgamedb.com/forums/uploads/mw/pacify-core.jpg
Sometimes it is mentioned in card text:
http://www.cardgamedb.com/forums/uploads/mw/helm-of-fear-cor...
The best method to find if something is psychic effect is to ask yourself, is it affecting the mind of target - if yes, you should search the card for 'Psychic' trait and probably you will find it.