Same But Different
In some ways we are all the same. We all have the same human nature. We share a common humanity. We all have human bodies and human minds, we all have human thoughts and human feelings.
Yet in other ways we are all completely different and unique. No two people are truly alike. No two people can ever have the same experience of life, the same perspective, the same mind.
Even identical twins are unique in this respect: twin number 1 will always be twin number 1 and will never know what it is actually like to be twin number 2, to experience life and see the world through number 2’s eyes. (See  No Two Alike by Judith Rich Harris.)
Somewhere between these two — our common humanity and our unique individuality — lies personality.
Personality is about our different ways of being human. How we are all variations on the same themes. How the human nature we all share manifests in different styles of thinking, feeling and acting.
Personality can be defined in different ways, depending on whether we focus on the individual or on people in general.
If we focus on people in general, then we can define personality in terms of individual differences — that is, the range of different styles of thinking, feeling and acting.
Just as human beings can differ a great deal in terms of their physical traits (height, weight, hair, and so on), they also differ in terms of mental and behavioural traits. For example, some people are noticeably talkative and outgoing while others are noticeably quiet and reserved. Such differences and variations are seen everywhere throughout the human population.
If we focus on the personality of a specific individual, we can define it as that person’s particular set of enduring dispositions or long-term tendencies to think, feel and act in particular ways.
We’re not talking about specific actions being repeated again and again, like compulsive hand-washing, but about overall patterns, tendencies, inclinations. Someone who has tended to be quiet and reserved up to now will probably still tend to be quiet and reserved tomorrow. That doesn’t necessarily mean that they are compelled to be quiet and reserved at all times, in every possible situation. Rather, they are disposed to be be quiet and reserved more often than not.
We can also sometimes see changes in an individual’s personality over time. There may be subtle developmental changes during adolescence, for example, or there can be quite dramatic alterations following a massive brain injury.
Before we move on, here is a little puzzle to think about:
Is personality simply an umbrella term for all our dispositions (how we think and feel and act), or is it a ‘thing’ in its own right, a whole that is greater than the sum of its parts? Some psychologists see it one way and some see it the other way. For example:
“Your personality style is your organizing principle. It propels you on your life path. It represents the orderly arrangement of all your attributes, thoughts, feelings, attitudes, behaviors, and coping mechanisms. It is the distinctive pattern of your psychological functioning—the way you think, feel, and behave—that makes you definitely you.” — The New Personality Self-Portrait by Oldham and Morris. 
Talking About Personality
In ancient times it was thought that all people could be divided into four basic types — sanguine, choleric, melancholic and phlegmatic. This was supposedly something to do with the dominant fluids in their bodies (blood, yellow bile, black bile or phlegm).
This idea was briefly revived in Renaissance Europe and there are some modern versions of it around today. (See  Passions and Tempers by Noga Arikha.)
Despite the simple appeal of this approach, trying to fit all the world’s people with their amazing range of differences into so few boxes is not easy.
For example, ‘sanguine’ people are supposedly extroverted, creative, sensitive, compassionate, thoughtful, tardy, forgetful and sarcastic. But in fact there is no evidence that these characteristics go together at all. You can certainly be creative without being extroverted. You can certainly be compassionate without being sarcastic. So what does being ‘the sanguine type’ really mean, if anything?
Dividing people up into a few types may be a nice and simple way of looking at the world, but in reality it doesn’t get us very far.
A Thousand Words?
An alternative approach used by modern psychologists is to simply focus on the words we use to describe each other’s personalities. The idea that such words can tell us about personality, or at least how we conceive personality, is known as the lexical hypothesis.
When we try to describe someone in words — whether it’s their physical appearance or their personality — we focus on describing their most distinctive features. This is because we tend to notice and remember outstanding characteristics.
For instance, we might describe some people as tall and some as short, though there is no word in the dictionary to describe people of average height. Likewise, the words we use to describe personality focus on how individuals stand out as above or below average in their mental and behavioural characteristics.
So, just as we might describe someone as quite tall and completely bald based on their most obvious physical attributes, we will also describe personality using phrases like quite nice but extremely quiet. The words most often used refer to the extremes rather than the averages.
And these extremes can be organised into pairs of opposites — shy v. outgoing, impulsive v. cautious, dominant v. submissive, and so on.
Now, if we take all the personality-describing words in a dictionary (thousands of them!) and then analyse how much people think they differ or overlap in terms of meaning, we find that they can be organised into a certain number of sets or ‘clusters’. For example:
- Words like domineering, autocratic, and pushy all have a similar (though not identical) meaning.
- Words like domineering and submissive or friendly and hostile have opposite meanings, just like tall and short.
- Words like domineering, patient, and playful have no particular relationship, just like tall and bald.
So if we cluster together all words that have a b-r-o-a-d-l-y similar meaning, how many clusters do we get?
There is actually no single answer as it depends on how where you draw the line, statistically. You can have more clusters of words with highly similar meanings, or you can have fewer clusters of words with more vaguely similar meanings.
The main question psychologists were interested in is: How FEW clusters can we reduce all these words to? (Scientists are always looking for ways to reduce complex things to the most simple account possible.) And doing exactly this kind of analysis, what psychologists have found again and again is that personality words can be reduced to just five clusters.
In other words, there are five big sets of words (including their opposites) which contain pretty much all of the words we might use to describe personality. This is one of the most robust findings to come out of decades of research into human personality.
The Big Five
These five sets are commonly known as the Big Five. We could simply call them Factor 1, Factor 2 and so on, but they have been labelled as follows:
- EXTROVERSION — the tendency to be outgoing, energetic and sociable
- OPENNESS — the tendency to enjoy variety, novelty, challenge and intellectual stimulation
- NEUROTICISM — the tendency to experience unpleasant emotions
- AGREEABLENESS — the tendency to be friendly, compassionate and cooperative
- CONSCIENTIOUSNESS — the tendency to show self-discipline and self-control
Each of these five factors is actually a sort of mega pair of opposites: Extroversion v. Introversion, Openness v. Closedness, Neuroticism v. Emotional stability, Agreeableness v. Hostility, Conscientiousness v. Spontaneity. For example, we find that there is one whole set of words which describe either aspects of Extroversion (outgoing, energetic) or its opposite, Introversion (quiet, withdrawn).
It’s as if every word we may use to describe one another’s personality falls under one of these five headings.
So in contrast to the ‘types’ approach, many psychologists now understand personality as how we all vary on these five dimensions or five factors. It’s not that the world is divided into (say) sanguines and cholerics and so on. Rather, we are all variations on the same themes, and these variations define our personality traits. We each have our own scores on the same five scales. An introvert, for example, is simply someone who scores low on the extroversion scale.
The H Factor
The five factors are not etched in stone. Many studies suggest that we can (and should) include a sixth factor, called Honesty/Humility (or the H factor). This is essentially a dimension of character maturity, ranging from high selfishness to high integrity.
A problem with the five or six factors is that they don’t really account for personality. They just organise the words that people use to talk about personality into the fewest number of sets, and treat those sets as ‘dimensions of personality’.
In addition, the number of clusters or factors we ‘find’ depends entirely on how strict or how loose we are with our statistics. To get down to five factors we have to accept fairly loose connections between words. This means that, for example, we get lots of surprisingly different traits lumped together under ‘extroversion’ (such as dominant, outgoing and passionate), which is kind of reminiscent of having lots of different things attributed to the ‘sanguine’ type.
We could, however, be much stricter with our factor analysis and look for smaller clusters of words which are strongly connected.
When researchers do this, they can identify around 20-30 factors. In fact, many now see each of the Big Five factors as a sort of general “super-trait”, each one covering a number of specific sub-traits or facets that are narrower in scope:
Different researchers have identified different facets, but generally they describe 3 to 5 facets associated with big factor. This seems to give a much richer description.
So if the question is …How many personality traits are there?
The answer is … How many do you want?
It’s all about whatever is convenient for any given discussion. If you want to divide people into two types (say, extravert versus introvert), then you can. If you want to describe how people vary in broad brush-strokes, then you can use the Big 5 (or 6) factors. If you want a high resolution picture of individual differences, then you can use 20-30 facets or more.
Just remember: these factor/trait models are all about the words we use to talk about personality… which begs the question: How much do they tell us about personality itself?
For example, what if there are some aspects of personality that do not manifest as dimensions with polar opposites (as in dominant-v.-submissive) but instead, like eye colour or hair type, do actually manifest in discrete categories? (Could the psychopathic type be one of them?)
Funnily enough, despite widespread confirmation of the Big Five (or six), there is still no agreed psychological understanding of personality. This is because psychologists have yet to agree on their understanding of human nature. Different psychologists hold fundamental beliefs that are diametrically opposed.
(As an aside, many students who study psychology are disappointed to find that this is the case. They begin hoping to learn “what makes people tick” based on good science. Instead, they just learn about competing theories and schools of thought.)
The many ‘classical’ branches of psychology include psychodynamics (or Freudian psychology), behaviourism, neuropsychology, evolutionary psychology, cognitive psychology, and social psychology. Each takes a different approach to explaining human nature, human behaviour and human personality. For example:
- According to evolutionary psychology our behaviour is biologically-driven by our genes, which were shaped by natural selection over several million years.
- According to behaviouristic psychology, our behaviour is biologically-driven plus the result of prior conditioning as we encounter rewards and punishments.
- According to psychodynamic psychology, our behaviour is biologically-driven plus the result of unconscious conflicts and repressed memories from childhood.
- According to cogitive psychology, our behaviour is biologically-driven plus the result of how we learn to process information.
- According to social psychology, our behaviour is biologically-driven plus the result of how what we learn is shaped by our surrounding society, culture, and the groups we belong to.
Each of these schools of thought emphasises the importance of one source of influence. And they all appear to be right! But at the same time, perhaps, each also loses sight of the bigger picture. Psychology has become rather more fragmented than integrated.
Free Will v. Determinism
One thing all of the classical branches of psychology agree upon is that our every thought, feeling and action is determined by pre-existing forces beyond our control — the forces of nature and/or nurture.
In other words, we are entirely the products of our genetics, our upbringing, our environment, or whatever. It’s all out of our control. We are nothing but biological machines, genetic puppets.
This has been the core assumption of most theorists.
But since the middle of the 20th Century, some psychologists have questioned this assumption:
- Is everything we think, feel and do really determined by forces beyond our control, or do we have at least some free will to make our own decisions?
- Can we change and improve our future selves by choice, or are we doomed to remain hapless products of our past?
Free will is a profound issue. Some psychologists believe in it but many — perhaps the majority — do not. Why? Because it does not sit easily with the scientific assumption that all events are automatically determined by prior events.
This difference of opinion has a dramatic effect on how different psychologists study human behaviour and personality, how they interpret research findings, and what they believe it is possible for human beings to achieve.
The New Psychologies
In contrast to the ‘classical’ psychologists who view the person as no more than a biological machine, there has been a new wave of psychologists who emphasise the role of consciousness and free will:
- Humanistic psychologists focus on the individual’s use of free will in shaping their own personal development.
- Positive psychologists focus on enhancing the experience of life, rather than just just repairing psychological damage.
- Transpersonal psychologists focus on exceptional human experiences which suggest the role of spiritual factors in human life.
Humanistic psychologists such as Carl Rogers and Abraham Maslow have emphasised that personality development is at least partly the result of our conscious choices in life. If people want to change their own personalities, their intention to do so is important. (It is this perspective that has given birth to the hugely popular self-help and personal growth movements.)
Temperament & Character
Suggesting that we have free will doesn’t mean denying that we are constrained by the forces of nature and nurture. Both can be true. For this reason, some psychologists have come to see personality as both externally determined and internally driven.
Or to put it another way:
Personality = Temperament + Character
- Temperament refers to those traits that are determined by our nature and nurture.
- Character refers to how we develop as individuals, how we choose to deal with life as we grow through experience.
Character is also the sum of our choices, for better or worse — our virtues and vices. A person of good character, for example, has high integrity; a person of bad character does not. It helps to be a good judge of character.
It has been said that temperament is something we share with other animals, while character is, perhaps, uniquely human.
According to the Temperament and Character model, character consists of three elements —
- Self-directedness: the tendency to determine one’s own experiences across different situations
- Cooperativeness: the tendency to co-exist harmoniously with others across different situations
- Self-transcendence: the tendency to meaningfully relate one’s personal experience to life or the universe as a whole
The Self-Transcendence aspect of character refers to the drive some people have to search for something beyond their individual existence — the spiritual dimension. (See also Maslow’s Hierarchy of Human Motivation, where Self-Transcendence is viewed as the highest drive the top of the pyramid.) The temperament and character model is the only major model of personality to include this aspect, though it appears to be central to our well-being. (See  Feeling Good: The Science of Well-Being)
So … What is Personality?
Bottom line: It depends upon your perspective on human nature.
If you believe that people are biological machines driven by their genes, their brains, and their environments, then the personality is simply those differences in behaviour that are caused by nature and/or nurture — genetic, biological, and environmental factors.
If you believe that people can consciously change and improve themselves to some extent, then personality is a whole that is greater than just the sum of its parts (traits). Personality is something we can consciously develop, like our physical health and fitness. This includes the possibility of developing character: a set of strengths and virtues (as well as weaknesses and vices) that individuals can adopt and develops throughout life.
If you believe that people are, as the saying goes, spiritual beings having a human experience, part of a self-evolving cosmic consciousness, then personality is like an individually-tailored garen’t worn for the experience.
Notes / Further Reading
No Two Alike: Human Nature and Human Individuality, by Judith Rich Harris.
The New Personality Self-Portrait: Why You Think, Work, Love and Act the Way You Do, by John M. Oldham and Lois B. Morris.
Passions and Tempers: A History of the Humours, by Noga Arikha
see also: http://www.passionsandtempers.com
Personality: What Makes You The Way You Are, by Daniel Nettle.
The H Factor of Personality: Why Some People Are Manipulative, Self-Entitled, Materialistic, and Exploitive – And Why It Matters for Everyone, by Kibeom Lee and Michael C. Ashton.
Feeling Good: The Science of Well-Being, by C. Robert Cloninger.