MONTREAL -- Online parental controls aren't all created equal, according to a new study by Montreal researchers.

Concordia master’s student Suzan Ali explained to CTV why some of these programs can do more harm than good.

Watch Ali's interview in the video above, and see the table below for a comparison of strengths and weaknesses of different online parental controls, republished with the researchers' permission.

Parental control table by Concordia researchers