The effects tend to vary greatly from person to person but as an general kind of thing..
In the short term; people will either act out or act in.. they'll either want pretty much constant reassurance from people and be scared to be on their own.. or they'll close down and retreat for a while.
acting out is by far the healthiest option.. people heal much faster.
Nightmares are common.. a sense of being separate to others and not fitting in.. feeling alone, feeling scared - feeling that part of you is missing.. emotions can be out of control or closed down.
In the longer term;
many people who were abused/assaulted struggle a lot with intimacy and trust in later relationships..
some people completely avoid relationships.. some people avoid emotional intimacy and have a lot of short lived relationships/dating things..
Some people really want to have a relationship and can connect emotionally but sex can be really difficult - I've personally struggled a lot and always thought that sex was just something you had to do to keep the other person around (my body is what i was taught my ''worth'' is/was).
Underneath it all though, i'd seriously love to form a proper relationship with someone - I am however, really difficult to get to know properly.. I get scared when people get close, then close down and pull back - then regret it and kick myself but usually the other person has assumed i'm just not interested by that point..
sigh..
I do consider indecent assault as belonging to the sexual abuse category - it makes your body feel like it's public property - like it's no longer yours..you have no choice in saying yes or no.