Personality makes us who we are. It influences almost every aspect of our lives, from what we choose to do for our earning, to how we interact with our families, to our choices of friends and life partner. But what are the factors influencing our personality? Can personalities, be changed or do the overall traits remains constant throughout life.

1.  Birth Order Can Influence Your Personality

You probably have heard of this concept before also. First born children are often described as "bossy" or "responsible," while last-born children are sometimes considered as "irresponsible" and "impulsive." But how true are these common stereotypes?

 A few recent studies have found that such things as birth order and family size may indeed have an impact on personality. One study even found that birth order can influence your choices of friends and romantic partners; first-borns tend to associate with other first-borns, middle-borns with other middle-borns and last-borns with last-borns.

2.  Your Personality Is Relatively Stable throughout Life

Some of the most core parts of personality remain stable throughout life which has been shown in the long-term studies of personality,. Three aspects that do tend to change as we age are anxiety levels, friendliness and eagerness for different and unique experiences.

 According to researcher Paul T. Costa Jr., he suggested in a New York Times article that there isn’t any evidence of you as overall personalities keeps changing as we grow older. Whatever changes you go through in life are your roles and the issues that you go through which matters the most to you. People think their personality has changed as they are aged, but it is only their habits, their health, their responsibilities and circumstances that changes but not their basic personality,"

3.  Personality Traits Are Linked to Certain Illnesses

In the past researches, a number of different personality traits have been suspected contributing towards the particular illnesses. For instance aggression and hostility were often linked to heart disease. The difficulty which was faced, that some studies revealed a link, in contrast to that  other studies demonstrated no such connection.

 Recently, researchers have used a statistical technique called as meta-analysis to reevaluate the connection between personality and disease based on the previous research. They rediscovered some unnoticed connections previously between neurotic personality traits and five illnesses;  arthritis, heart disease, headaches, peptic ulcers and asthma.

4.  Animals Have Distinctive Personalities

Have you ever wondered if your beloved pet has a personality that makes him utterly unique? Animal researchers have found animals from nearly every species of animal (from spiders to birds to elephants) have their own personalities with preferences, behaviors and quirks that persist throughout their life.

 5.  Current Research suggests that there are Five Core Personality Traits

In the past, researchers had big debates on exactly how many personality traits existed. Early researchers suggested that there were as many as 4,000 distinct personality traits, while others proposed that there were 16. Today, many personality researchers support the five-factor theory of personality, which describes five broad personality dimensions that compose human personality:

1.      Extraversion

2.      Agreeableness

3.      Conscientiousness

4.      Neuroticism

5.      Openness

6.  Personality Influences Personal Preferences

It is not shocking to learn that your personality can have a profound effect on your personal preferences. From your choice of friends to clothing to your taste in food and music, your unique personality can influence nearly every choice you make in your daily life.

For example, while you might take pride on yourself by considering the issues before choosing a candidate to support, research suggests that personality plays a strong role in political preferences. One study conducted by researchers at the University of Toronto found that individuals who identified themselves as conservatives were higher in a personality trait called orderliness, while those who self-identified as liberal were higher in empathy.

7.  People Can Accurately Judge Your Personality Based on Your Facebook Profile

When you think about people's online identities, you might imagine that most people try to present an idealized version of their real selves. After all, in most online situations you get to pick and choose the information that you want to reveal about yourself. You can select the most attractive photos of yourself to post and you can edit and revise your comments. Surprisingly, one study discovered that Facebook profiles are actually quite good at conveying your real personality.

 8.  Numerous Factors Can Contribute to Personality Disorders

Researchers have found out a number of factors that may contribute to the onset of different personality disorders such as obsessive-compulsive disorder and borderline-personality disorder.

These factors include:

·         Genetics

·         Relationships with peers

·         High sensitivity

·         Verbal abuse

·         Childhood trauma

9.  Your Pet May Reveal Information about Your Personality

Would you consider yourself more of a "dog lover" or a "cat lover”? According to the study of personalities, your answer to this question might actually reveal important information about your personality.

Researchers asked participants whether they considered themselves to be more of dog people or cat people. The researchers also conducted survey on personality survey that measured a number of broad traits including openness, conscientiousness, and neuroticism.

 The researchers came to the conclusion that people who identified themselves as dog lovers tend to be more extrovert  and eager to please others, while those who described themselves as cat lovers are more introvert and curious.