The Secret Life of Pronouns_ What Our Words Say About Us - James W. Pennebaker [4]
If a group of clinical psychologists or just regular people read these essays, could they decipher what dimensions of writing predicted improved physical health? We tried this and the answer was no. The stories were too complicated and even the most conscientious readers couldn’t agree about which elements of people’s heartbreaking stories were most meaningful. Some other approach was needed to unlock the reason behind the effectiveness of expressive writing.
THE COMPUTER REVOLUTION AND THE BIRTH OF LIWC
It was 1991 and the revolution in computer technology was well under way. There had been some major breakthroughs in the computerized analysis of language in research that had been done at Princeton, Harvard, and MIT in the 1960s and 1970s. Surely, with this new technology, I could get a computer program that could analyze my trauma essays. No judges, no heartache. I could get some answers with the press of a button.
Unfortunately, no simple computer programs were available at the time. “How hard could it be to write such a program?” I asked myself. By a happy coincidence, a new graduate student who had been a professional programmer had just joined my research team. “Martha,” I casually told her, “I’ve got a great idea for a new program that should only take about three weeks to develop.” Martha E. Francis turned out to be a creative programmer with a flair for social psychology, though she had no idea what she was getting into. Although the guts of the program were written very quickly, the “three-week project” took on a life of its own. In three years, we finally rolled out the first version of a computer program we called Linguistic Inquiry and Word Count, or LIWC (pronounced “Luke”).
The idea behind LIWC was that the words people used—whether in a trauma essay or everyday speech—would reflect their feelings and that by the simple process of counting these words we could gain insights into their emotional states. We assumed that angry people would use anger-related words; sad people would use sadness words. In writing about a trauma, the emotional states of our participants should be reflected in their selection of emotionally relevant words.
So, in developing the LIWC program, we created a series of word dictionaries designed to capture different psychological concepts. For example, we built an anger dictionary, now made up of over 180 words, that comprised numerous words related to anger, such as hate, rage, kill, slash, revenge, etc. We also included word stems such as kill so that any word that starts with the letters K-I-L-L, such as killer, killing, kills, and killed, would be counted as well. We then went on to build dictionaries for sadness, anxiety, positive emotions, and other mood states.
The trauma essays differed in multiple dimensions beyond their emotional tone. To cast a fairly broad net we developed other lexicons that measured the occurrence of other types of words, such as the use of different types of pronouns (e.g., first-person singular—such as I, me, and my), articles (a, an, the), different types of thinking-related words that signal cause-effect thinking (cause, because, reason, rationale), and so forth. Before we knew it, we had created almost eighty different dictionaries that we felt would include nearly all of the types of words people commonly use in everyday language.
The reason it took almost three years to get LIWC running was because of the painstaking process of building each dictionary. We employed an army of students who evaluated every word that was part of any dictionary. For example, should the word frustration be included in the anger dictionary? Panels of student judges had to all agree