dear fellows'
i had wonderful experience in css psychological as well as in viva and scored well but fell in written thats why could not get allocated because of low score in written. any way, practice is useful for psychological for verbal and non verbal both...group tasks pay a lot in good performance in verbal test while in non verbal candidate has to do perform efficiently and positively in given time...i all learnt this from psychologist member of commission...so, some tips are also required to write picture stories, sentence completion, autobiography and personality performa .....some one has to shape his personality according to the job requirements which i learned.
moreover, IQ, testing can be done well by practice , for this issb books are sufficient.
for verbal session, need to improve spoken skills , argumentative ability , etc
posture, gesture, gait style, eye contact, talking style all are noticed by the panel as well.
concludingly, its not easy as seems , its the test of personality indeed.