Similar to tinsel, these long strips of shiny foil are used to decorate a christmas tree. what are they called?

They are called "Icicles".

Sparkly bits of festive decoration, tinsel is a standout among the best time and energetic occasion home embellishments. You can enhance the tree with the glossy strands, yet you can likewise make a great deal of others things and spots shimmer with a touch of Christmas cheer. Along these lines, let us demonstrate to you how! With all it's dynamic metallic shades, impersonating icicles everything being equal and sizes, tinsel is an incredible wellspring of occasion enrichment and DIYing for around the house.

i believe the answer is: description

description refers to the goal of psychologist to identify the phenomenon that being observed. this goal is being actualized by collecting data/information from various clues that observed through the phenomenon. this goal must be accomplished before pyschologist able to create methods of treatment.