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Positive Affectivity is a characteristic that describes how animals and humans experience positive emotions and interact with others and with their surroundings. Those with high positive affectivity are typically enthusiastic, energetic, confident, active, and alert. Those having low levels of positive affectivity can be characterized by sadness, lethargy, distress, and un-pleasurable engagement (see negative affectivity).

About Positive Affectivity
Despite the dramatic contrast in their names, positive affectivity (PA) and negative affectivity (NA) are nearly independent of each other, ; one could be high in both PA and NA, high in one and low in the other, or low in both. Affectivity has been found to be moderately stable over time and across situations (such as working versus relaxing). Positive affectivity may influence an individual's choices in general, particularly their responses to questionnaires.

Happiness, a feeling of well-being, and high levels of self-esteem are often associated with high levels of positive affectivity, but they are each influenced by negative affectivity as well. Trait PA roughly corresponds to the dominant personality factors of extraversion. ; however, this construct is also influenced by interpersonal components.

Testing for Positive Affectivity
Because there is not a hard-and-fast rule for defining certain levels of positive affectivity, different self-reported assessments use different scales of measure. Several prominent tests are listed below; in each of these, the subject determines the degree to which a given adjective or phrase accurately characterizes him or her. •	Differential Emotions Scale (DES): A PA scale that assesses enjoyment (happy or joyful feelings) and interest (excitement, alertness, curiosity). •	Multiple Affect Adjective Checklist – Revised (MAACL-R): Measures PA according to the DES scale and to an additional scale assessing thrill-seeking behavior (how daring or adventurous one might be). •	Profile of Mood States (POMS): Uses vigor scale to assess the domain of PA. •	Expanded Form of the Positives and Negative Affect Schedule (PANAS-X): This test uses three main scales – joviality (how cheerful, happy, or lively), self-assurance (how confident and strong), and attentiveness (alertness and concentration).

The Effects of Positive Affectivity
Positive Affectivity is an integral part of everyday life. PA helps individuals to process emotional information accurately and efficiently, to solve problems, to make plans, and to earn achievements. The broaden-and-build theory of PA suggests that PA broadens people’s momentary thought-action repertoires and builds their enduring personal resources.

Research shows that PA relates to different classes of variables, such as social activity and the frequency of pleasant events. PA is also strongly related to life satisfaction. The high energy and engagement, optimism, and social interest characteristic of high-PA individuals suggest that they are more likely to be satisfied with their lives. In fact, the content similarities between these affective traits and life satisfaction have led some researchers to view both PA/NA and life satisfaction as specific indicators of the broader construct of subjective well-being.

PA may influence the relationships between variables in organizational research. PA increases attentional focus and behavioral repertoire and the enhanced personal resources can be used to overcome or deal distressing situation. These resources are physical (e.g., better health), social (e.g., social support networks), intellectual and psychological (e.g., resilience, optimism and creativity). PA provides a psychological break or respite from stress, supporting continuing efforts to replenish resources depleted by stress. Therefore, it is evident that PA is good for our health. Its buffering functions provide a useful antidote to the problem associated with negative emotions and ill health due to stress. Likewise, happy people are better in coping. McCrae and Costa concluded that PA was associated with more mature coping efforts.