Iraqi army soldiers disassembling an improvised explosive device during a training exercise conducted by US soldiers on May 18, 2011. Getty Images Researchers at Arizona State University are using artificial-intelligence technology to analyze tactics used by the Islamic State militant group. The algorithmic system, which analyzed 2,200 incidents in the second half of 2014, found that the Islamic State, also known as ISIS or ISIL, is more likely to use improvised explosive devices after it is targeted in a bombing campaign.

"When they experience a lot of airstrikes against them they shift away from a large infantry-style operation and use IEDs," Dr. Paulo Shakarian, one of the coauthors of a research paper scheduled to be presented next week, told the BBC. "We believe this relationship is because they want to prevent reinforcements from the Iraqi army getting out of Baghdad."

Researchers unaffiliated with the study added that using so-called big data to identify and examine attack trends could help international forces predict what kind of strikes are most likely at what time, or provide important targeting information on where to strike ISIS most effectively.

"Improvised explosive device (IED) incidents have been a common tactic used by Iraqi insurgents throughout the US-led Operation Iraqi Freedom," the study said. "Though the IED comprises a smaller weapons system normally employed by local insurgent cells, spikes in such activity could be meaningful. For instance, it may indicate action ordered by a strategic-level command that is being carried out on the city level, or it may indicate improved logistic support to provide local cells the necessary munitions to carry out such operations in larger numbers."

News of this research comes as Shakarian and a team of ASU researchers are at work on another study funded by the US Department of Defense examining how ISIS uses social media to recruit potential terrorist operatives.