Fliers face new queries at Logan

“We’re not looking for the answers necessarily; we’re instead gauging the reaction, the response to the question,’’ said George Naccara, TSA federal security director at Logan.

If a person is deemed to be a possible threat, he or she will be pulled aside for additional screening, such as a pat-down or a bag search, and in some cases the Massachusetts State Police will be alerted. Questioning will take place at a separate podium after a traveler’s documents have been checked, and those identified for more screening will be sent to a third station.

“We don’t expect to have any disruption in service,’’ said Todd Smith, director of aviation operations for the Massachusetts Port Authority.

Logan is also changing its security routine on a separate front: It is one of six airports trying out a new security policy for children 12 and under that allows them to keep their shoes on and avoid going through full-body scanners, which show a slightly blurred image of the passenger’s naked body. The program is being tested for two weeks in Terminal C, home to JetBlue Airways and United Airlines.

“We’ve identified that children 12 and under present a very low risk,’’ Naccara said.

Both programs are part of a new risk-based approach to security aimed at minimizing passengers’ inconvenience, officials said.

In 2003, Logan became the first US airport to use behavior detection, modeling its system after those used at airports around the world. That program, called Screening of Passengers by Observation Techniques, or SPOT, is used at 160 airports nationwide to identify and question passengers who are deemed to be suspicious. That can include anything from wearing a winter coat buttoned up in the middle of the summer to providing evasive answers to basic questions.

The new 60-day trial program at Logan differs in that all travelers will face questioning, no matter what their attire or behavior.

SPOT has resulted in 2,000 arrests since it began nationwide in 2004, according to the TSA, but Naccara could not say how many were terrorist-related.