The Inspector Guardians are not only concrete in speech and cooperative in getting things done, they are also directive and attentive in their social interactions. Though not always open about directing others, still they are not the least bit reluctant in this regard.

About ten percent of the general population, Inspectors are characterized by decisiveness in practical affairs, are the guardians of time-honored institutions, and, if only one adjective could be selected, "dependable" would best describe this type. Whether at home or at work, iStJs are extraordinarily reliable and dependable, particularly when it comes to inspecting the people and things in their field of vision. Inspectors can be counted on to scrutinize the products and accounts of the institutions they serve-the company's books, the farmer's crops, the manufacturer's goods-but also to examine the attitudes and actions of those around them. Inspectors are earnest and thorough in their inspecting; all must go under their magnifying glass, so that no deviation from the official standard is left undetected. It is their duty to spot and to report any and all discrepancies, though they prefer to work behind the scenes and not confront the deviators. Indeed, iStJs are rather quiet and serious types, making their inspections without flourish or fanfare, and, therefore, the dedication they bring to their work can go unnoticed and unappreciated.

Inspectors have a distaste for and distrust of fanciness in speech, dress, or place. Their words tend to be simple and "down home," not showy or high-flown; their clothes are often practical and conservative rather than of the latest style or extravagant; and their home and work environments are usually neat, orderly, and functional, rather than up-to-date or luxurious. In their choice of personal property (cars, furnishings, jewelry, and so on) price and durability are of primary concern, comfort or appearance given small consideration. "Classics," antiques, and heirlooms are especially prized, having achieved a certain time-honored status -- iStJs prefer the old-fashioned to the newfangled every time. Even on vacation, "no nonsense" seems the term for this type, who tend not to be attracted by exotic foods, beverages, or locales.

President Harry S. Truman is an example of an Inspector Guardian.