Hawthrone effect

"Hawthorne effect" is also known as demand characteristics, which means slight change in people's behaviour when they are observed by others.It is the phenomenon which is thought to occur when people observed during a research study, temporarily change their behavior or performance. It is generally used in studying organizational behaviour. But I want to relate it with our day-to-day life.

I want to cover it under the topic "projecting our self".
"First impression is the last impression."Is it always true? No, not in all situation. I mean to say that sometimes it works, but most of the time it does not.
As we start spending time together we often realize that what we previously observed about that person, is not exactly true. It is human nature that we often try to project our good qualities to others and try to hide our bad habits.

We all like to be appreciated, that is why sometimes we behave in extremely good manner(that good manner might not be inculcated in our nature, but just for appreciation we do it.) . And the person in front of us is bonded to praise and think good about us.

One incidence regarding this:

Once there were some guests were invited at my aunty's residence. So, she was very busy in cleaning and cooking. My younger cousin was watching it deeply. She was unable to understand why her mummy is doing lots of work. My aunt changed the bed-sheet of her bed-room too. Though the guests were not expected to visit that room. They all arrived on time, everything was successfully done. They were about to leave and were praising my aunty for good food and keeping her house so neat and clean. Then suddenly, my cousin interrupted saying, "you all have not seen those bed-sheets which mummy has changed today, previously an older one was there".
Every one was laughing on the spot.

This is what most most of us do when we get to know that someone is watching our behaviour. We try to project only our good qualities, trying to hide our bad qualities.