SAN FRANCISCO — For all the talk from the technology industry about valuing diversity and equality, it has struggled to close the gender pay gap, according to new research from Glassdoor, a website where current and former employees anonymously review companies and management.

The report, based on 534,000 anonymously shared employee salaries, found that the largest pay gap — adjusted for experience, education, position, location and industry — existed among certain types of computer programmers, with men making on average 28.3 percent more than their female counterparts.

Among programmers, scientific and mainframe computer coders saw the greatest disparity. Significant gaps also existed in tech jobs such as video game artists (15.8 percent), information security specialists (14.7 percent) and front-end engineers (9.7 percent). The pay disparity among those coders ranked just above chefs (where the adjusted gap is 28.1 percent), dentists (also 28.1 percent) and senior executives (27.7 percent).

There are many reasons why such significant gaps exist, but one simple answer, according to Andrew Chamberlain, chief economist at Glassdoor who spearheaded the report, is workplace bias.

“My view is that in heavily male-dominated fields, the people who are making the decisions about pay and promotion are disproportionately men, and that can play a role in why we're seeing gaps in male and female pay,” he said.

The professions that came closest to achieving pay parity were event coordinators (with men on average making 0.2 percent more than women) and therapists and business coordinators (with women making 0.5 percent more than men in both).

tlien@tribpub.com