When young Steven Spielberg was first offered the screenplay for “Jaws” he said he would direct the movie on one condition: That he didn’t have to show the shark for the first hour. By slowly building the audience’s apprehension, he felt, the shark would be much more impressive when it finally arrived.

He was right. I wish he had remembered that lesson when he was preparing “Jurassic Park,” his new thriller set in a remote island theme park where real dinosaurs have been grown from long-dormant DNA molecules. The movie delivers all too well on its promise to show us dinosaurs. We see them early and often, and they are indeed a triumph of special effects artistry, but the movie is lacking other qualities that it needs even more, such as a sense of awe and wonderment, and strong human story values.

It’s clear, seeing this long-awaited project, that Spielberg devoted most of his effort to creating the dinosaurs. The human characters are a ragtag bunch of half-realized, sketched-in personalities, who exist primarily to scream, utter dire warnings, and outwit the monsters.

Richard Attenborough, as the millionaire who builds the park, is given a few small dimensions – he loves his grandchildren, he’s basically a good soul, he realizes the error of tampering with nature. But there was an opportunity here to make his character grand and original, colorful and oversize, and instead he comes across as unfocused and benign.

As the film opens, two dinosaur experts (Sam Neill and Laura Dern) arrive at the park, along with a mathematician played by Jeff Goldblum whose function in the story is to lounge about uttering vague philosophical imprecations. Also along are Attenborough’s grandchildren, and a lawyer, who is the first to be eaten by a dinosaur.

Attenborough wants the visitors to have a preview of his new park, where actual living prehistoric animals live in enclosures behind tall steel fences, helpfully labeled “10,000 volts.” The visitors set off on a tour in remote-controlled utility vehicles, which stall when an unscrupulous employee shuts down the park’s computer program so he can smuggle out some dinosaur embryos. Meanwhile, a tropical storm hits the island, the beasts knock over the fences, and Neill is left to shepherd the kids back to safety while they’re hunted by towering meat-eaters.

The subsequent events – after the creatures get loose – follow an absolutely standard outline, similar in bits and pieces to all the earlier films in this genre, from “The Lost World” and “King Kong” right up to the upcoming “Carnosaur.” True, because the director is Spielberg, there is a high technical level to the execution of the cliches. Two set-pieces are especially effective: A scene where a beast mauls a car with screaming kids inside, and another where the kids play hide and seek with two creatures in the park’s kitchen.

But consider what could have been. There is a scene very early in the film where Neill and Dern, who have studied dinosaurs all of their lives, see living ones for the first time. The creatures they see are tall, majestic leaf-eaters, grazing placidly in the treetops. There is a sense of grandeur to them. And that is the sense lacking in the rest of the film, which quickly turns into a standard monster movie, with screaming victims fleeing from roaring dinosaurs.

Think back to another ambitious special effects picture from Spielberg, “Close Encounters of the Third Kind”. That was a movie about the “idea” of visitors from outer space. It inspired us to think what an awesome thing it would be, if earth were visited by living alien beings. You left that movie shaken and a little transformed. It was a movie that had faith in the intelligence and curiosity of its audience.